Egg-white and glue moulds for casting vessels
With a lettered circular diagram (c) among the mirror-script notes
The visible page is largely mirror-script, with a small circular disc drawn on a vertical shaft, hatched and marked with the letter c, and a further lettered reference (d) in the notes below — untranscribed mechanical jottings that continue the notebook's gear studies. The transcription supplied for this folio instead sets out a craft recipe for casting vessels: make the cup a good finger thick so it survives shrinkage, bind the paste with egg-white, glue, gum arabic or fish-glue, tint it with sandalwood or madder to imitate carnelian, and form it in thin unglazed terracotta moulds soaked in oil or tallow, releasing the cup on its male core once baked.
On this page
Wall thickness for the cast cup
The cup should be made a good finger thick, so that as it dries and shrinks it still retains sufficient thickness. The instruction anticipates the diminution of the material during drying.
Egg-white, glue and fish-glue paste tinted like carnelian
Take glue and egg-white, or else gum arabic; fish-glue serves the same as egg-white and, cast onto the ground, will not break if made thin and light. Tinted with sandalwood or madder, the paste takes on the look of carnelian.
Making and releasing the egg-white vessel moulds
The moulds are to be of thin unglazed terracotta, soaked in olive oil or tallow so they do not dry out. Once the egg-white body is baked, the outer mould is taken off and the cup left to dry on its male core.
Lettered circular diagram (c) among the notes
A small hatched disc on a vertical shaft is drawn at the top of the page and marked c, with a further letter d cited in the writing. These lettered mechanical jottings are not covered by the supplied transcription and are noted here as further untranscribed material.