Search results for 'sulphate'

Gypsum is powdered Calcium Sulphate, a traditional ingredient in gesso grounds used in southern Europe. One of the advantages of preparing your painting surface with gypsum is that it allows for a particularly even absorption of the paint film. It can also be added to acrylic primers to increase absorbency or add tooth to a surface. Learn More

Gesso di Bologna is a bright white Calcium Sulphate, or gypsum, from Italy, which can be used as a substitute for whiting in the preparation of gesso. It is ground to a particularly fine powder, which makes it a suitable ground for gilding, as the small size of the particles allows for greater compression when burnishing. Learn More

This ink is made to the recipe that Jane Austen used to draft her novels. Austen's maid took this formula from Martha Lloyd's book, ‘The House Keeper’. She used good-quality English oak galls, but poorer quality beer than Isaac Newton, and added a little sugar. Her recipe is less stable and turns ‘antique brown’ over a long period of time, while Sir Isaac Newton's remains black. Initially a medium blue-grey, it darkens to a rich matte back, slightly warmer in tone than our regular Oak Gall Ink. It is made in small batches and blended to give the required consistency and strength, and is fully waterproof in 5-7 days. Permanent and lightfast, it has been steeped for several weeks and left to ‘mature’ for several more in the bottle. When used on animal skins such as vellum, the acids in the Oak Gall Ink react with collagen, effectively ‘etching’ itself into the surface, hence its permanence. 

 

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Formulated to the exact recipe used by Isaac Newton, this ink is completely permanant, as his surving writings attest. Although composed of very similar ingredients to our Jane Austen Ink, we consider Newton's recipe to be superior, as Austen's has browned slightly over time. Initially a medium blue-grey, it darkens to a rich, matte back, which is slightly warmer in tone than our regular Oak Gall Ink. It is made in small batches and blended to give the required consistency and strength, and is fully waterproof in 5-7 days. Permanent and lightfast, it has been steeped for several weeks and left to ‘mature’ for several more in the bottle. When used on animal skins such as vellum, the acids in the Oak Gall Ink react with collagen, effectively ‘etching’ itself into the surface, hence its permanence. 

Not suitable for fountain pens. Learn More

Exclusive to Cornelissen, our intense black Iron Oak Gall Ink is inspired by a medieval recipe using oak galls collected in Cambridgeshire. The small, handmade batches are blended to give the required consistency and strength, and are steeped for several weeks and allowed to mature for several more. Lightfast and fully waterproof 5-7 days after application, Oak Gall Ink has been used for centuries by calligraphers and scribes to create illuminated manuscripts and legal documents. When used on animal skins such as vellum, the acids in the Oak Gall Ink react with collagen, effectively ‘etching’ itself into the surface, hence its permanence. As with all products derived from natural ingredients, there may be slight variations in the colour and consistency of the ink due to seasonal changes. Not Suitable for fountain pens.

 

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Whiting is powdered Calcium Carbonate, which can be mixed with rabbit skin glue to create a chalk-based ground for oil, tempera, distemper or encaustic painting. Traditionally, whiting was an important ingredient when preparing painting surfaces in the north of Europe, as opposed to gypsum (Calcium Sulphate), which was widely used south of the Alps. Learn More