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Contact Cement: Crude Rubber Dissolved in Benzine
Mary

Yaremwe na

Mary

17. Ukwakira 2026FI
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Contact Cement: Crude Rubber Dissolved in Benzine

Crude rubber cut into fine threads swells and dissolves in benzine (light naphtha) to a cement as thick as honey (Spon, Workshop Receipts, 1879). Coat both surfaces, let them dry, and press them together: the bond forms at once, with no clamping. It joins leather straps, patches and rubber soles. The picture: our drawing of the bottle, the shreds and a glued strap.
Utangiye
A few days

Amabwiriza

1

Cut the rubber fine

With a wet knife, cut the crude rubber into the thinnest possible slices. With shears, divide them into threads as fine as yarn.

Ibikoresho by'iyi ntambwe:

Urupapuro rw'umupira rwumishijwe n'umwotsiUrupapuro rw'umupira rwumishijwe n'umwotsi13 g

Ibikoresho bikenewe:

Icyuma cy'UbukorikoriIcyuma cy'Ubukorikori
Imikasi MininiImikasi Minini
Iminzani ya Digitale yo mu GikoniIminzani ya Digitale yo mu Gikoni
2

Fill the bottle

Put the shreds in a wide-mouthed bottle, a tenth of its space or less. Fill it three-quarters full with good benzine, free from oil. Keep it away from flames.

Ibikoresho by'iyi ntambwe:

NafitaNafita425 ml

Ibikoresho bikenewe:

Icupa ry'IkirahureIcupa ry'Ikirahure
Icyombo cyo gupimaIcyombo cyo gupima
3

Let it swell and dissolve

The rubber swells at once. Shake it often; in a few days it is as thick as honey. Lumps left: add benzine. Too thin: add rubber.

Ibikoresho bikenewe:

Icupa ry'IkirahureIcupa ry'Ikirahure
4

Glue by contact

Brush cement on both surfaces and let it dry a few minutes. Give three coats in all, then press the two faces together; no clamp is needed.

Ibikoresho bikenewe:

Uburoso bwo gusiga igifatanyaUburoso bwo gusiga igifatanya
5

Rubber per pint

Gupakira ikaye ya Jupyter…

Ibikoresho

2

Ibikoresho bikenewe

6

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.

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