Opacity: 1,443 Reports on Whether the Ink Shows Up
Opacity is only ever asked about when a light ink meets a dark surface, which is why the pool is small and the complaint rate is high: 1,443 buyer mentions across 58 of the 4,486 products here, 604 of them negative. That is 42%. Almost every negative report describes one coat where two were needed, and the reports that say so are the most useful evidence on this page.
Opacity carries 2,280 searches a month across 85 keywords at a keyword difficulty of 0, and the head term is a product rather than a problem: white markers at 800. The two chemistries that answer it are acrylic markers and paint markers, and the counts below show how far apart they are from everything else.
The Headline Count
1,443 buyers mentioned opacity across 58 of the 4,486 products in this catalogue. 604 of those mentions are negative and 839 positive, a 42% negative rate.
It is a small pool because it is a conditional question. Nobody asks whether a black marker covers white paper. Opacity is raised when a light ink meets a dark ground — white on black card, pastel on kraft, any colour on a chalkboard or a navy shirt — and only 58 products in this catalogue are bought for that job often enough to generate the topic.
Restricted to the eleven scored chemistries the figure is 51 products carrying 1,257 mentions at 44% negative, which is 87% of the pool. That is the highest chemistry purity of any attribute on this site: opacity is asked about markers and almost nothing else.
Which Types Cover and Which Do Not
| Marker type | Reports | Products | Negative | Rate |
|---|---|---|---|---|
| Liquid chalk | 41 | 1 | 27 | 66% |
| Alcohol | 5 | 1 | 3 | 60% |
| Fabric | 388 | 6 | 227 | 59% |
| Permanent | 26 | 2 | 10 | 38% |
| Acrylic | 699 | 37 | 259 | 37% |
| Paint | 107 | 5 | 30 | 28% |
Two rows carry real weight. Acrylic at 699 mentions across 37 products is the largest sample and sits at 37% negative. Fabric at 388 across six products is second and sits at 59%, the worst well-sampled rate here.
Paint markers at 28% negative are the best, from 107 reports on five products — a smaller sample, and directionally consistent with the chemistry. Paint is pigment in a water or oil base engineered to be opaque on dark and non-porous surfaces, and it is the industrial standard on metal for that reason.
The liquid chalk and alcohol figures come from single products and are not measurements. Alcohol markers are transparent dye by design; they are meant to layer and blend, not to cover, and five mentions is what a chemistry nobody asks to be opaque produces.
The One-Coat Problem
Read the negative acrylic reports and the same event appears repeatedly: a first pass judged as the finished result.
"Super disappointed. Also not very opaque. I had to go over larger sections twice, sometimes 3 times to match the opacity of my original marker." ARTISTRO Black Dual-Tip Acrylic Paint Pens, Set of 2
"They are just not opaque, you'd have to do several layers for the markers to cover well enough." Ohuhu Acrylic Paint Markers 36 Colors Brush & Fine Acrylic Markers
"I think I was influenced into buying these. They work fine but are not as opaque as the videos I watched made it look." Ohuhu Acrylic Paint Markers Brush Tip 48 Pack Opaque Acrylic Markers
Now the report from the same chemistry that states the operating condition.
"is a coloring sheet by Chet Minton from his Etsy shop, they are very opaque, and if the first layer is not opaque enough, the second layer will." Arrtx 48 Colors Acrylic Marker, for Rock Painting, Extra Brush Tip
"They work wonderfully and are VERY opaque, dry down quickly, and don't bleed or drip." Utillo Craft White Paint Pen, 8-Pack, 0.7mm Extra Fine White Paint Markers
Acrylic reaches full opacity in two passes with the first allowed to dry. Going over a wet first coat lifts it and the result looks worse than one coat did. That single procedural fact accounts for a large share of the 604 negative mentions, and it is why the second buyer above — describing the same class of pen — reports the opposite outcome.
There is a genuine failure inside the same pool, and it reads differently.
"Translucent and streaky. No matter how many layers you put it WILL NOT be opaque." Ohuhu Acrylic Paint Markers 36 Colors Brush & Fine Acrylic Markers
"nibs and despite priming attempts the colors are just very weak and not opaque." Arrtx 48 Colors Acrylic Marker, for Rock Painting, Extra Brush Tip
"No matter how many layers" and "despite priming attempts" are the phrases that separate a thin pigment load from an impatient buyer. Both of those reports come from buyers who did the procedure and still failed, and they are the ones a product page should answer for.
Fabric Is the Hardest Case
388 mentions at 59% negative across six products makes fabric the worst coverage surface in this catalogue, and the mechanism is physical rather than chemical. A woven surface scatters light in every direction and drinks pigment into the fibre, so the same ink that covers black card solidly reads as grey on a black shirt.
"retracing the letters on the fabric over and over and it was still very faint and hard to read." Artline White Permanent Fabric Markers for Clothing, 2 Markers
"Instead, it is a very bold, bright, raspberry pink which would not work for my project at all. There are NO PASTELS in this set of markers." Zenacolor, 20 Fabric Markers Permanent for Clothes, Fine Point
Those are two different failures worth keeping apart. The first is coverage: white on cloth, retraced, still faint. The second is colour rendering: a set sold with pastels delivering saturated tones, which is a naming problem rather than an opacity one but lands in the same topic because buyers describe both as the colour not being right.
Zenacolor leads the fabric-marker category with 20,257 deduplicated buyer ratings from one product, so this is the best-selling fabric marker in the catalogue producing that report. Coverage on dark cloth is hard for everyone.
Chalk on a Dark Board
The single liquid chalk product in this pool runs at 66% negative, which is the worst rate in the table from the smallest sample.
"They are very runny and it is not opaque at all . I do not recommend." Mr. Pen Liquid Chalk Markers, 8 Pack, Reversible Tip, Vibrant Colors
"they do not show up very well and are very dull I wouldn't recommend." Mr. Pen Liquid Chalk Markers, 8 Pack, Reversible Tip, Vibrant Colors
Liquid chalk has to stay removable, which caps how much binder it can carry, which caps opacity. That is the trade the chemistry makes: an ink that wipes off glass cannot also lay down a permanent opaque film. Acrylic covers a chalkboard properly and rates works there at 370 searches a month, and it needs alcohol to remove.
What the Matrix Says
| Marker type | Paper | Whiteboard | Chalkboard | Glass | Wood | Metal | Plastic | Ceramic / mug | Rock / stone | Fabric | Skin | Car window | Cardboard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Permanent Solvent dye ink. Bonds to porous surfaces, sits on top of non-porous. | ◐If… 250/mo Bleeds through anything under 100 gsm. 24,394 buyer reports mention bleed resistance, 51% of them negative. | ○No 30/mo Bonds to the board. Needs a dry-erase marker over the top or solvent to lift. | ○No 10/mo Permanent on a porous chalkboard. It will not come off. | ◐If… 560/mo Sits on top and scratches off with a blade. Not weatherproof. | ◐If… 30/mo Feathers along the grain on bare wood. Seal it first. | ●Works 1,000/mo The classic use. Bonds well and survives handling. | ◐If… 200/mo Adheres, but rubs off under friction on smooth polypropylene. | ◐If… 80/mo Sits on the glaze. Wipes off with alcohol; not dishwasher safe. | ◐If… no measured demand Absorbs into porous stone and dulls. Paint markers are the honest choice. | ◐If… 4,360/mo Permanent, but stiffens the weave and bleeds on thin cotton. | ○No 160/mo Solvent ink. Not formulated for skin contact. | ○No no measured demand Will not come off tempered glass without solvent. | ●Works 30/mo The labelling default. Bleeds through single-wall, which rarely matters. |
| Dry erase Oily release agent keeps pigment from bonding. Wipes dry off non-porous only. | ○No 300/mo No release surface. It smears and never dries. | ●Works 10,880/mo The intended surface. 33% of 18,792 erasability reports are still negative — ghosting is real on older boards. | ○No 430/mo Porous board ghosts permanently. Use a liquid chalk marker. | ●Works 4,280/mo Glass boards erase cleaner than melamine. Streaks more with cheap ink. | ○No no measured demand Absorbs into the grain and stains. Use a paint marker. | ◐If… 90/mo Works on a painted steel board, not on raw metal. | ◐If… 10/mo Only on a gloss laminate. Matte plastic holds the pigment. | ◐If… no measured demand Works on glazed tile. Wipes with a dry cloth. | ○No no measured demand Porous stone stains. Use an acrylic or paint marker. | ○No 510/mo Stains. 510 searches a month ask this; the answer is no. | ○No 130/mo Not formulated for skin. Use a body marker. | ◐If… 40/mo Erases dry but runs in rain. Use a chalk or washable marker. | ○No 250/mo Absorbs and never dries. Use a permanent marker. |
| Wet erase Water-soluble paste. Stays put until wiped with a damp cloth. | ○No 40/mo Water-soluble paste never dries on paper. Use a permanent or fine-tip marker. | ●Works 120/mo Stays put under a sleeve or a hand. Needs a damp cloth. | ◐If… no measured demand Works on a sealed chalkboard, ghosts on a porous one. | ●Works 10/mo The menu-board standard. Damp wipe removes it cleanly. | ○No no measured demand Bare wood drinks the paste. Seal it, or use a paint marker. | ◐If… no measured demand Only on a sealed or painted surface. | ●Works no measured demand Excellent on laminated overlays and sleeve protectors. | ●Works no measured demand Wipes off glaze with water. | ○No no measured demand Porous stone absorbs it. Use an acrylic or paint marker. | ○No no measured demand Runs in the wash. Use a fabric marker. | ○No no measured demand Not formulated for skin. Use a body marker. | ◐If… no measured demand Rain removes it, which may be the point. | ○No no measured demand Soaks into the board and never dries. Use a permanent marker. |
| Alcohol Alcohol-carried dye. Blends, but soaks and feathers on absorbent stock. | ◐If… 1,820/mo Feathers and bleeds on anything but marker paper. 1,820 searches a month are people looking for the right stock. | ○No 10/mo Stains melamine permanently. Use a dry erase marker. | ○No no measured demand Porous board absorbs the dye and stains. Use a liquid chalk marker. | ◐If… 90/mo Beads on glass and wipes off with alcohol. Not a glass marker. | ◐If… 170/mo Absorbs into bare wood like a stain. Some people want that. | ○No 60/mo Beads and rubs off. Use an oil-based paint marker. | ◐If… 270/mo Streaks on gloss. Works on primed styrene for models. | ○No no measured demand Beads on the glaze. Use a paint or acrylic marker. | ○No 10/mo Soaks in and dulls. Use an acrylic marker. | ◐If… 900/mo Bleeds into the weave and is not wash-fast. | ○No 900/mo Alcohol dye, not cosmetic grade. Use a body marker. | ○No no measured demand Wipes straight off tempered glass. Use a chalk or washable marker. | ◐If… 10/mo Bleeds heavily unless the board is coated. |
| Acrylic Water-based pigment with binder. Opaque, dries to a film. | ●Works 570/mo Opaque on black card, which is what 570 searches a month are asking about. | ○No 100/mo Dries to a permanent film. Use a dry erase marker. | ●Works 370/mo Opaque on black. Needs alcohol to remove. | ●Works 460/mo Dries to a durable film. Bake ceramic-safe ranges to set. | ●Works 90/mo Sits on the surface without feathering. | ●Works 250/mo Adheres and stays put. | ●Works 410/mo The standard choice for 3D prints and models. | ◐If… no measured demand Needs baking to survive washing. Check the range. | ●Works 90/mo The rock-painting default. | ◐If… 1,690/mo Stiffens the weave. Heat set and expect a hand feel. | ○No 310/mo Not cosmetic grade. Use a body marker. | ◐If… no measured demand Permanent on paint. Only on glass, and only with care. | ●Works 10/mo Opaque and does not bleed. |
| Paint Pigment paint, water or oil based. Opaque on dark and non-porous. | ●Works 250/mo Opaque, no bleed. | ○No 30/mo Dries to a permanent film. Use a dry erase or wet erase marker. | ●Works 390/mo Opaque on black. Water-based ranges wipe with a damp cloth. | ●Works 3,870/mo 3,870 searches a month. Water-based wipes off, oil-based stays. | ●Works 270/mo No feathering, full opacity. | ●Works 990/mo Oil-based is the industrial standard. | ●Works 610/mo Adheres to most plastics without primer. | ◐If… 120/mo Not dishwasher safe unless the range is bake-set. | ●Works 290/mo Weatherproof once sealed. | ◐If… 3,160/mo Stiff and only semi wash-fast. | ○No 1,000/mo Not cosmetic grade, despite 1,000 searches a month asking. | ◐If… 2,350/mo 2,350 searches a month. Water-based only, on glass only, never on paint. | ●Works 10/mo Opaque and clean. |
| Liquid chalk Water-based pigment. Wipes off non-porous, stains porous. | ○No 130/mo Soaks and buckles the sheet. Use a paint or acrylic marker. | ◐If… 1,060/mo 1,060 searches a month. It works but needs a damp wipe, not a dry eraser. | ◐If… 2,370/mo 2,370 searches a month. It stays put and needs a damp cloth plus scrubbing on porous board. | ●Works 3,430/mo 3,430 searches a month. The intended surface. Damp wipe removes it. | ○No 30/mo Stains bare wood. Seal it, or use a paint marker. | ◐If… 160/mo Only on sealed or painted metal. | ◐If… 10/mo Only on gloss. | ●Works no measured demand Wipes off glaze. | ○No no measured demand Stains porous stone. Use an acrylic or paint marker. | ○No 160/mo Stains the weave. Use a fabric marker. | ○No 10/mo Not formulated for skin. Use a body marker. | ●Works 1,170/mo 1,170 searches a month. The car-window standard. Washes off with soapy water. | ○No no measured demand Soaks into the board. Use a permanent or paint marker. |
| Fabric Textile dye or pigment, heat-settable. | ◐If… 100/mo Works but bleeds; the ink is made for fibre. | ○No no measured demand Stains melamine permanently. Use a dry erase marker. | ○No no measured demand Stains porous board. Use a liquid chalk marker. | ○No no measured demand Beads off glass. Use a paint or chalk marker. | ◐If… 10/mo Absorbs unevenly along the grain. Seal it first. | ○No 20/mo Will not adhere. Use an oil-based paint marker. | ○No no measured demand Rubs off under friction. Use an acrylic marker. | ○No 120/mo Beads off the glaze. Use a paint marker. | ○No no measured demand Absorbs and dulls. Use an acrylic or paint marker. | ●Works 24,430/mo 24,430 searches a month, the largest single cell in the matrix. Heat set it or it fades in the wash. | ○No no measured demand Textile dye, not cosmetic grade. Use a body marker. | ○No no measured demand Textile dye beads off tempered glass. Use a chalk or washable marker. | ◐If… no measured demand Absorbs into the flute and spreads. Fine for a label, not for artwork. |
| Body Cosmetic-grade ink formulated for skin contact. | ◐If… no measured demand Works, but it is an expensive way to draw on paper. | ○No no measured demand Stains melamine. Use a dry erase marker. | ○No no measured demand Stains porous board. Use a liquid chalk marker. | ○No no measured demand Beads off. Use a paint or chalk marker. | ○No no measured demand Absorbs into the grain. Use a paint marker. | ○No no measured demand Beads off. Use an oil-based paint marker. | ○No no measured demand Rubs off. Use an acrylic marker. | ○No no measured demand Beads off the glaze. Use a paint marker. | ○No no measured demand Soaks into the stone. Use an acrylic marker. | ◐If… no measured demand Will mark clothing and is not wash-fast. Use a fabric marker and heat set it. | ●Works 4,290/mo 4,290 searches a month. Cosmetic-grade ink, the only type formulated for it. Durability is the weak point: 378 reports, 170 negative (45%). | ○No 10/mo Textile dye beads off tempered glass. Use a chalk or washable marker. | ◐If… no measured demand Absorbs into the flute and spreads. Fine for a label, not for artwork. |
| Washable Water-soluble dye designed to release from skin and fabric. | ●Works 40/mo The kids-and-coloring default. | ◐If… 500/mo 500 searches a month. Works on the board, needs a damp wipe. | ○No no measured demand Stains porous board. Use a liquid chalk marker. | ●Works 1,480/mo 1,480 searches a month. Washes off with water, which is the whole point. | ○No no measured demand Absorbs and stains the grain. Use a paint marker. | ◐If… 260/mo Rubs off with handling unless the surface is sealed. | ◐If… 80/mo Wipes off gloss, but stains matte plastic. | ●Works no measured demand Rinses off glaze. | ○No no measured demand Soaks into porous stone and dulls. Use an acrylic marker. | ◐If… 1,360/mo 1,360 searches a month. Washes out of most cotton, not out of everything. | ●Works 750/mo 750 searches a month. Designed to come off skin with soap. | ●Works 500/mo 500 searches a month. Rinses off with a hose. | ◐If… 410/mo Absorbs into the flute unless the stroke is light. |
| Dot / dauber Water-based dye in a sponge applicator. | ●Works no measured demand The intended surface for toddlers. | ○No no measured demand Pools and smears on a non-absorbent board. Use a dry erase marker. | ○No no measured demand Stains porous board. Use a liquid chalk marker. | ○No no measured demand Pools and runs off. Use a chalk or washable marker. | ◐If… no measured demand Absorbs into bare wood and blooms. Seal it first. | ○No no measured demand Pools and never dries. Use a paint marker. | ○No no measured demand Pools on the surface. Use an acrylic marker. | ○No no measured demand Pools on the glaze. Use a paint marker. | ◐If… no measured demand Absorbs unevenly unless the stone is sealed. | ◐If… 10/mo Not wash-fast. | ◐If… no measured demand Washable formulas only; check the label. | ○No 10/mo Pools and runs off tempered glass. Use a chalk or washable marker. | ●Works no measured demand Absorbs cleanly. |
Opacity is the reason two cells in the grid read the way they do. Acrylic on paper is a works verdict at 570 searches a month specifically because it is opaque on black card, where every dye-based chemistry disappears. Acrylic on chalkboard is works at 370 for the same reason, with the removal caveat attached.
Paint markers hold works on chalkboard at 390, on glass at 3,870 and on metal at 990 — three dark or reflective surfaces where a transparent ink is invisible. That is the whole commercial case for a pigment marker over a dye one, and 553 products in this catalogue make an opacity claim in the title or bullet points while 311 name white and 183 mention black or dark paper.
The trade-off runs directly against the other big paper attribute. Ink opaque enough to sit on top of a dark sheet is ink that does not soak into it, which is why acrylic also carries the lowest bleed rate of any well-sampled chemistry — the full counts are in 24,394 buyer reports on bleed resistance.
What to Do With This
Two coats, with the first dry. That is the single instruction that resolves most of the complaints quoted above, and the buyers who state it get the opposite result from the buyers who do not.
Test on the actual surface before committing, especially on cloth. A pen that covers black card can still read grey on a black hoodie, and 59% of fabric opacity reports being negative says most buyers discover that on the garment.
Match the chemistry to the ground. Dark, non-porous or coloured surfaces want acrylic or paint. Dye-based chemistries — alcohol, washable, dot, wet erase — are transparent by design, and asking them to cover is asking for the one thing they were built not to do.
Frequently Asked
Five questions from the 85 keywords in the opacity cluster, answered from 1,443 buyer reports across 58 products.
How often do buyers say a marker is not opaque enough?
42% of the time. 1,443 mentions across 58 products, 604 negative against 839 positive. Opacity is the smallest well-populated topic on this site apart from odour, because it is only raised when someone is marking a dark or coloured surface.
Which marker type covers best?
Paint markers, at 28% negative across 107 reports and five products, then acrylic at 37% across 699 reports and 37 products. Acrylic carries the largest sample here and is the type rated works on paper and chalkboard for exactly this reason.
Which marker type covers worst?
Fabric markers, at 59% negative across 388 reports and six products. White and light ink on dark cloth is the hardest coverage problem in this catalogue: the weave scatters light and absorbs pigment, and buyers describe retracing letters and still finding them faint.
Why is my white marker see-through?
Almost always because it is one coat. Acrylic and paint pens reach full opacity in two passes once the first is dry. One buyer wrote: 'if the first layer is not opaque enough, the second layer will'. Going over a wet first coat lifts it instead of covering.
What markers write on black paper?
Acrylic and paint markers. Acrylic rates works on paper at 570 searches a month specifically because it is opaque on black card, and it rates works on chalkboard at 370 for the same reason. 311 products here name white in the title and 553 make an opacity claim.