Inked Fabric Printer Ribbon: Tricresyl Phosphate, Castor Oil and Carbon Black Ink (Neidich, Underwood, US 2,139,092)

Ribbon inks made with plain oils went thin in warm weather and rancid with age, so the ribbon printed unevenly and soon dried out. Neidich replaced half the oil with tricresyl phosphate, which keeps the ink at an even thickness and does not oxidise. Result: a fabric ribbon saturated with a non-drying black ink for typewriters and printers. Source: Neidich, US 2,139,092 (Underwood Elliott Fisher, 1938). Not given: which fibre the ribbon is woven from (he says only an absorbent fabric), how the ink is put on. Picture drawn by Youblob.

متوسط

2 hours

التعليمات

Weigh the ink

Parts by weight: tricresyl phosphate 50, castor oil 50, carbon black 20, Prussian blue toning base 20. Neidich allows some variation.

المواد لهذه الخطوة:

فوسفات ثلاثي الكريسيل50 parts

زيت الخروع (معصور على البارد، خالٍ من الهكسان)50 parts

مسحوق أسود الكربون20 parts

الأزرق البروسي20 parts

الأدوات المطلوبة:

مطحنة

Grind the pigments into the oils

Grind the carbon black and Prussian blue with the tricresyl phosphate and castor oil in a mill until the colour is spread evenly through the ink.

الأدوات المطلوبة:

مطحنة

Take an absorbent ribbon fabric

Use a woven ribbon of absorbent fabric. Neidich does not say which fibre or width.

المواد لهذه الخطوة:

قماش شريط غير محبَّر1 as required

الأدوات المطلوبة:

مقص

Saturate the ribbon

Saturate the ribbon with the ink. Neidich says only that it is applied as usual. Ours: run it through the ink and squeeze it between rollers so it is evenly wet, not dripping.

الأدوات المطلوبة: