@@ -198,6 +198,67 @@ Adding color directly in the printing paste will make an ink.
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### Screen printing
The canvas is coated with a photosensitive product which, after exposure, allows the ink to pass only on the exposed surface.
Silk-screen printing is widely used for its resistance and ease of production.
Preparation utensils :
- Spoons
- Beaker
- Maryse
o Bowls
Printing tools :
- Screen printing frame pre-insulated
- Squeegee
- Iron or alum printing paste
- Colour juice from the dye bath
1 - Making your printing paste
It is made with iron or alumina acetate.
The two must not be mixed. The plates must be cleaned well after use.
Alumina acetate :
- 200ml vinegar 10/12% (the higher the acidity, the better)
- 12g alumina sulphate
- 10g soda crystals
- Guar gum powder
Iron acetate :
- 200ml 10/12% vinegar (the higher the acidity, the better)
- 12g iron acetate
- 10g soda crystals
- Guar gum powder
Preparations:
- In a beaker, pour the vinegar, then the alumina or iron sulphate, then the soda crystals.
<aside> ⚠️ Follow the order of the ingredients carefully. Add the soda crystals in small quantities to the mixture. Beware of the acid-base reaction, it foams!
</aside>
- Mix everything well, there should be no lumps left.
- Add the guar gum gradually according to the desired texture.
<aside> 🥽 You need to reach the texture of honey. Mix well while adding pinches of gum. The preparation will keep for a week max in a fridge preferably.
