Michel Garcia

June 2012

Printing on Textiles with Plants for Polychromatic Effects

Course Description
Block printing techniques are fascinating, but not very easy to develop in a home workshop. However, an attractive approach will be presented in this class, using some very simple polystyrene blocks,

Our 1st experiment will involve the preparation of some organic indigo vats. Then, by using our home-made blocks, or ordinary brushes, some resists will be prepared and applied on fabric, in order to get some white designs on a blue background when dipped in the indigo vat. This method allows us to obtain three different blue shades together with white parts on the same textile. [The examples proposed here are different from the ones previously presented in Session I, so it will increase the possibilities for participants who already took the first week’s class.] [last sentence not included on website]

Our 2nd experiment: it is possible to get all kinds of attractive shades using mordent cellulosic fibers with some aluminum acetate, On such a treated piece, printing some with lemon juice, it is possible to discharge locally the mordent in order to get some white designs on a colored background. Again, the processes presented here are different than the one presented in Session I, so the participants can increase their knowledge.]

Our 3rd experiment: any mordent left can be thickened with guar gum and printed on a cellulosic fabric, then dyed. So, there will be no waste of mordent. The aluminum mordents always give some colored patterns, but for dark shades, another mordent is suited: the ferrous mordent is easily prepared and applied. By mixing aluminum and ferrous mordents, a large range of shades is obtained when the printed piece is dipped in a dye pot.

Our 4th experiment: most of the dye pot wastes are precious as reducing agents for the preparation of indigo vats: some examples will be developed here, using madder, and other wastes.

Our 5th experiment: As you know now, the indigo on resist patterned pieces will give some white designs on a blue background. Now, by printing some mordents on the white parts, and by a subsequent dye, some polychromatic designs can be obtained

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