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A Colour A Day: Week 39

Ruth Siddall20 December 2020

A Colour A Day: Week 39. 14th-20th December

Jo Volley writes…

I’m only happy when I’m trying to create something new’: words by Henry Levison inventor of Liquitex acrylics paint. Levison was a colour chemist who ran Permanent Pigments, Cincinnati, Ohio, which had been milling colours from 1933. Acrylics were first developed as a solvent-based artists’ colour in the early part of the C20 and by 1955 Levison had perfected a commercially viable water-based acrylic. The Permanent Pigments went on to be called Liquitex.

Henry Levison inventor of Liquitex.

Colours are from the Liquitex Soft Body Acrylic range on W&N watercolour paper and read from left to right:

Quinacridone Burnt Orange
Quinacridone Blue Violet
Indanthrene Blue
Parchment
Bronze Yellow
Prism Violet
Muted Violet

A Colour A Day: Week 31

Ruth Siddall25 October 2020

A Colour A Day: Week 31. 19th -25th October

Jo Volley writes…

This week’s colours are manufactured by Ruth Siddall who says of them. ‘Procion MX Dyes – The difference between a dye and a pigment is that a dye is soluble in water and a pigment is insoluble. I am experimenting at the moment to try and find as many ways of making the colourful, organic compounds in dyes into insoluble pigments. These are a series of pigments I made by dyeing a starch with modern Procion MX dyes. I used potato starch as a substrate. I have seen modern dyes such as rhodamine being used in this way, so I thought I’d give it a go. If I’m honest, I’m disappointed with the pale colours produced – quite the opposite of the dyes which were intensely coloured! Chemically, Procion MX dyes are dichlorotriazines, which means they contain a ring-shaped molecule with three nitrogen ions so the formula is C3H3N3 (most ring molecules just have six carbons). In addition there are two chlorine ions attached to this ring and it is these that bond to -OH groups in fibres to produce strong dyes on cloth. Starch has -OH groups, so I had hoped it would work the same way here. There is some colour but it’s not as intense as I had hoped for.’

Each pigment is bound in gum Arabic on W&N watercolour paper. They were like no other pigment I have used before – it was rather like trying to paint with clouds – amorphous – the colour just slipping away. According to the American Meteorological Society, amorphous clouds ‘are without any apparent structure at all, as may occur in a whiteout in a thick cloud or fog over a snow surface when one loses any sense of direction – up, down and sideways’

Procion red MX-G
Procion yellow MX-4G
Procion blue MX-2R
Procion yellow MX-3K
Procion turquoise MX-G
Procion composite grey
Procion red – MX-5B

 

 

 

Recipes and Talks

Ruth Siddall20 October 2020

 Here are some link to resources and that people might find useful. 

Ruth Siddall’s Recipes

Slade School Pigment Farm Talks 

Over the Spring we had a series of lockdown talks to celebrate the Pigment Farm Project; the talks were about dyes, lake pigments and plants in art generally and come from Emma Richardson, Ruth Siddall, Nicholas Laessing, Andreea Ionascu and Lea Collet. You can watch the recordings of the talks here.

Slade Methods Room Recipes

Lots of pdfs with recipes and methods for making a range of artists materials and other constructions.