so i bought some ink from an art store that was going out of business and some of it is a bit watery. i know that i can thicken it up by adding white or by leaving them open and letting some of the water evaporate out. is it possible to add corn starch to thicken it? are there any other possible things to add to thicken it a bit?
you could try thickening it a bit by putting in some of the really thick extender base that speedball sells. it'll make the color a little more transparent, though. i'd say if you don't need it right away, i'd just leave the top off and let it evaporate a bit.
I've thickened by opening the container and slowly stirring it so that the evaporation is more even. If you leave the can/jar open, the top of the ink will thicken more and could dry out which is a pain.
hheya...i have really thin tw inks and thicken them all the time...from tw you can order a thickener for 12 bucks or something, but the chemist says it's main ingredient is found in a kitchen...that leads me to believe it's cornstarch. i say try it! what do you have to loose? if it doesn't work, the tw graphics product works really well and lasts a long time...
The paints described here for silk screen printing should have a shelf life of
several months when they are stored in jars with tight-fitting lids. The recipes
have been tried successfully in a temperate climate. Paints colored with powdered
tempera are more brilliant than those colored with food colors or ink. Other
water-soluble dyes can probably be used also.
Starch or cornstarch
Coloring matter (food color, tempera powder, ink, or a dye of some sort that is
Linit starch (not instant) 115 ml (1/2 cup)
Boiling water 345ml (1 1/2 cup)
Soap flakes 115ml (1/2 cup)
Mix starch with enough cold water to make a smooth paste. Add boiling water
and cool until glossy. Stir in soap flakes while mixture is warm. When cool, add
Bring water to a boil. Mix cornstarch with a small amount of cold water and stir
the two together. Bring, to a boil and stir until thickened. Add soap flakes while
This recipe produces paint that seems quite lumpy but this does not affect the
Dissolve 115ml (1/2 cup) cornstarch in 172.5ml (3/4 cup) cold water
Dissolve 1 envelope gelatin (15ml or 1 tablespoon, unflavored) in 57.5ml (1/4 cup)
Heat 460ml (2 cups) of water, pour in cornstarch. Add dissolved gelatin. Boil, and
stir until thickened. Cool and add 115ml (1/2 cup) soap flakes. Color.
NOTE: Adding 5 to 10ml (1 to 2 teaspoons) of glycerine to any of these
recipes will make the paint easier to use.
Never let dried particles of paint get mixed into the paint or fall onto the screen
because they may puncture the silk during the printing. A small hole in the silk
can be repaired with a small drop of shellac.