SECT. V. Of those Colours that are Washed and Grownd, how to temper them in your shells when you are to use them.
YOu having all Colours both Grownd and Wash∣ed by you in a readiness, when you begin
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YOu having all Colours both Grownd and Wash∣ed by you in a readiness, when you begin
any piece you must temper them as followeth, for which take one example ••or all.
Take any Colour, a small quantitie thereof, and put it into a clean shell, then add thereunto a drop or two of Gum-water, and with your finger (being clean) work it about the sides of the shell, and there let it stick till it be dry; when the colour is dry in the shell, draw your finger over it; if any Colour come off, you must add stronger Gum water to it. But, if when your Colour is dry in the shell, it glitter or shine, it is a sign there is too much Gum in it; therefore remedy that by tempering your Colour up again with fair water only, without any Gum.
There are some Colours, as Lake, Ʋmber, and other hard Colours, which when they are dry in the shell will crack, and look like parched ground in a drie Summer; to such colours as these, when you temper them for use, add to them a small quan∣tity of white Sugar-candy in fine powder, which temper with your Colour and fair water with your finger in the shell till the Candy be dissolved; and this will keep them from peeling when you have laid them on your Work.
Note here, that these Colours following, viz. Ʋmber, panish-Brown, Colen-Earth, Cherry-stone and Ivory-black are to be burnt before they be Wash'd or Grownd.
To burn any of them do thus, put the Colour in∣to a Crucible, such as Gold-smiths melt their silver in; if you will, cover the mouth thereof with clay, and set it in a hot fire, there let it rest till it be red hot when the Colour is cold you may Grind or Wash it according to former Directions.