UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Watercolour Paper: Thick Rag Sheets Sized with Gelatine
Watercolour paper is heavy rag paper sized with gelatine, so wet paint sits on the surface instead of soaking in. James Whatman made a paper for watercolours this way by the 1780s. The sizing here follows Andrew Ure (1839): dry hand-made sheets dipped in size boiled from skin, with a little alum, then pressed and dried slowly.
Hagati
About a week with drying
Amabwiriza
1
1
Make thick rag sheets
Make thick rag sheets
Form, press and dry rag sheets as in the linen-rag paper blueprint, but take up more stuff on the mould for a thicker sheet. Leave them unsized.
2
2
Make the size
Make the size
Melt hide glue in water to a thin size and stir in a little alum. Ure's size was skin boiled to a jelly, which is what hide glue is. Keep it warm, not boiling.
Ibikoresho by'iyi ntambwe:
Ifatanyo ry'uruhu rw'inyamaswa100 g
Alumu (Alumu ya Potasiyumu)10 g
Amazi2 litiroIbikoresho bikenewe:
Ibirika ry'Icyuma
Igipima Ubushyuhe3
3
Dip the sheets
Dip the sheets
Pour the size into a vat. Spread a few dry sheets out in it at a time so every part is wetted evenly; Ure calls this a nice operation.
Ibikoresho by'iyi ntambwe:
Impapuro20 impapuroIbikoresho bikenewe:
Igikonjo4
4
Press, part and dry slowly
Press, part and dry slowly
Press out the spare size between felts, part the sheets, press again and hang them to dry. Dry them slowly: Ure allowed three days.
Ibikoresho bikenewe:
Urupapuro rw'ubwoya bwashongeshejwe
Igikanda impapuro (ubwoko bwo gukanda ibitabo)
Umugozi wo kumishaho5
5
Press and pick
Press and pick
Press the dry sheets hard and pick out any knots with a small knife. For a smooth (hot-pressed) sheet, press each between smooth pasteboards with a heated iron plate in the pile, as Ure describes.
Ibikoresho bikenewe:
Igikanda impapuro (ubwoko bwo gukanda ibitabo)
Icyuma cy'Ubukorikori
Ikarito y'impapuro zifatanyijwe
Urupapuro rw'icyuma6
6
Limits
Limits
The sizing is Ure's; the size strength (100 g glue and 10 g alum in 2 litres) is ours. Wikipedia lists watercolour paper as hot-pressed (smooth), cold-pressed (textured) or rough, in 90, 140 or 300 lb weights.
Ibikoresho
4- Umwanya
- Umwanya
- 2 litiroUmwanya
- 20 impapuroUmwanya
Ibikoresho bikenewe
9- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.