How do you prime them?

A lot of people think these markers are dried but that’s not true. When they arrive the nibs/tips are white. That tells you you have a brand new posca which is a good thing. To get the posca to work you would have to first - shake the posca well - take off the cap and have paper ready to catch any paint flow -take your posca and pump it by pressing down the tip of the posca on the paper. Don’t press with force, press it up and down until you see the paint flowing down to the tip of the posca. If it doesn’t reach the tip keep pumping. Usually a 3-4 pumps should do it. - once the paint reaches the tip you’re all set to go. A helpful hint to keep these posca always moist is to keep them upside down not right side up. Most off close cap until u hear a snap. Posca are great but once they’re dry there useless unless you get another nib/tip. Hope this helps someone

this smear when I put on dodge dodge, does that happen to anyone else

If you meant Mod Podge, yes I have had it smear if you don’t allow the paint to dry completely before touching or adding more colors/lines. However once dry the pen lines will no longer smear. I have used these pens to sign artwork of many different mediums and they work great. I always do a starter push on a scrap piece of paper to avoid a gush of paint when getting started.

The description says "Reversible tip to ensure a long life". Is this really possible?

Yea. It’s just the same on both ends. So u just flip it if it starts to get old and worn. If it gets stopped up then it won’t helps, you’ll need to clean it instead.

Will these write on resin?

Yes, I am pretty sure they will write on resin, but not sure how long it would last, would probably have to seal the writing

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uni POSCA PC-3M Water-Based Paint Markers, Reversible Fine Tip (0.9-1.3mm), Assorted Colors, 8 Pack

uni POSCA PC-3M Water-Based Paint Markers, Reversible Fine Tip (0.9-1.3mm), Assorted Colors, 8 Pack

Product ID: 4912947

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Details

Brand
uni
Ink Color
Assorted
Number of Items
1
Point Type
Fine
Recommended Uses For Product
Writing

🌍works on 50+ surfaces

🎨8 vibrant, opaque colors

✏️0.9-1.3mm reversible fine tip

Description

🎨 Paint your world with precision and bold color—don’t just create, captivate!

SURFACE MASTERY - Permanent on porous, erasable on smooth non-porous surfaces—wood, glass, metal & more.
MIX LAYER BLEND - ACMI-certified paint that’s mixable and layerable for custom effects.
VIVID QUICK DRYING - Bright, opaque colors that dry fast for indoor and outdoor projects.
UNLEASH YOUR CREATIVITY - Water-based, non-toxic paint perfect for professionals and hobbyists alike.
PRECISION MEETS VERSATILITY - Reversible fine tip (0.9-1.3mm) for detailed lines and bold strokes.

The uni POSCA PC-3M markers are premium water-based paint pens featuring a reversible fine tip (0.9-1.3mm) and 8 vivid, opaque colors. Designed for over 50 surfaces including wood, glass, metal, and plastic, these quick-drying, non-toxic markers deliver permanent results on porous materials and erasable marks on smooth surfaces. Ideal for professionals and creatives seeking precision, versatility, and vibrant expression in one sleek tool.

Specifications

Manufacturer	Mitsubishi Pencil Corporation of America
Brand	uni
Item Weight	3.53 ounces
Product Dimensions	5.9 x 0.9 x 5.1 inches
Item model number	PC3M8C
Is Discontinued By Manufacturer	No
Color	Multicolor
Closure	Click-Off Cap
Grip Type	Contoured
Material Type	(Plastic; White Pigment; Black Pigment; Red Pigment; Yellow Pigment; Green Pigment; Pink Pigment; Blue Pigment; Water; Acrylic; Fiber Nib)
Number of Items	1
Size	Fine 3M
Point Type	Fine
Line Size	0.9-1.3mm
Ink Color	Assorted
Tip Type	marker
Manufacturer Part Number	PC3M8C

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