1 The Names of fuch Colours as are neceffary for the Washing of Maps, Charts, or Plots, with the manner how to temper and use the fame upon Velom, Paper or Parchment. T is not convenient for a Surveyor I when he hath drawn the draught of a Mannor, and reduced it to his intended bignefs, to repair to a Painter to finish his work, the thing itself being very commen: dable, and eafie to be attained: And befides a Painter is not to be found in-every Country, nor is every Painter furnished with Colours fitting for fuch a purpose, they for the moft part ufing more grofs and ordinary Colours. Now for the benefit of fuch who defire to exercise themselves in this kind of practice, I have added these neceffary directions following. How to make Gum-Water, Take Gum Arabick what quantity you pleafe, of the whiteft and cleareft you can get, which bruife into fmall pieces, and tie them up loofely in a fine linnen Rag, then take of the cleareft Water you can get, and put it into a clean veffel, as a poringer, (or fuch like) then hang your Cloath in which you put your Gum into this Water, letting it hang till all the Gum be diffolved; then when you put your Fingers into this Water, if you find them to ftick together, as if they were glewed, your Water is too ftiff of the Gum, which you may remedy by putting thereto more fair Water, and if you find it too weak, you may add more Gum; with this Water moft Colours are to be tempered. How to make Allum-Water. Take a Pound of Allum, and beat it to Powder, then take a Gallon of clean Water, and fet it on a Fire, letting it boil till all the Allum be melted, then take it off the Fire, and when it is cold you may put it into a Veffel and keep it for your ufe: With this Water, if you wet your Paper before you lay on your Colours, it will keep them from finking into the Paper, and will alfo add a Luftre and Beauty to the Colours laid there The Names of fuch Colours as are necessary for the Washing of Maps, Plots, or Charts. |