zest-it logo Zest-it Cold Pressed Linseed Oil zest-it logo

About Zest-it® Cold Pressed Linseed Oil

About Linseed and Linseed Oil.
Linseed oil is a yellow to amber coloured drying oil pressed from the dry ripe seeds of the Linseed plant (Linum Usitatissimum).
Linseed is a member of the family Linaceae of which there are over 120 species and one of the few plants that have true blue flowers. Linseed oil has been used for centuries in both paint and varnish, also in the making of linoleum, sailcloth, oilskins and some inks. The spent seeds after pressing produces 'Linseed-oil cake', this in the form of nuts and pellets becomes feed for farm animals.
The Flax plant fibres have been used for over 5000 years for the production of Linen, as cloth or canvas, finer forms as damask and lace. Coarser fibres give us twine and rope, fine fibres are used in paper, paper currency and cigarette paper. Its nectar feeds much of the insect world. It can also be found in health food shops as nutritional Flaxseed/Linseed oil. A wonderful little plant that serves many!

linseed flower
Linseed Flower



cold pressed linseed oil
Zest-it® Cold Pressed Linseed Oil




Dry colour pigment


125ml cplo
Zest-it® Cold Pressed
Linseed Oil



product safety information banner
Product Safety Information for Zest-it Cold Pressed Linseed Oil PDF


.pet 1reusable


Our Linseed oil comes direct from a farm in the UK that produces Flaxseed/Linseed oil for dietary and culinary use. It is cold pressed to extract the oil without the use of heat, solvent or chemicals.

Our unrefined Cold-Pressed Linseed oil is filtered to remove any suspended mucilage or particulate and is ideal for use with oil paint or for grinding your own pigments. It is the suspended mucilage and particulate that turns 'brown' over time, not the oil itself, so the extra filtering gives an oil that is less prone to yellowing.

The oil has good wetting properties with dry pigments and is formed easily into a paste before grinding on a glass slab using a Muller. There is a possibility of spontaneous combustion if contaminated cloth and rags are left crumpled up. Dry the rags flat, place in a metal airtight tin or wash with soap and water.

Cold-Pressed Linseed oil is very useful for those wishing to use less solvents in their work, working practice will need slight adjustment as a whole painting can be executed with just Cold-Pressed Linseed oil. Only a tiny amount needs to be added to the oil paint to alter it's working properties, we would consider this a 'fat' medium, so it is not advisable to place a solvent thinned paint layer over it, as this could cause cracking.

For those using CPLO for the first time some qualities are very apparent. It gives a loose, slippery quality to oil paint and compared to some mediums is fast drying. In our tests we found that adding between a 'touch' and 25% to oil paint, it was touch-dry in 24 hours, using more than 25% and the time to touch-dry was around 48 hours or longer depending on the oil paint used. When dry it forms a glossy, flexible, tough, resilient paint film.

cplo paint from tube
Paint straight from the tube, with a matt finish, for colour comparison.
cplo painted
First 'brushfull' - with a "touch" of Cold Pressed - touch-dry in 24 hours
Second 'brushfull' with 25% Cold Pressed - touch-dry in 24 hours
Third 'brushfull' with 50% Cold Pressed - touch-dry in 48 hours
Forth 'brushfull' with 75% Cold Pressed - just touch-dry in 48 hours

Although it levels the brush strokes and gives transparency to the paint film, if used as a glazing medium the 'fat over lean' principle needs to be adhered to.

It is advisable to use a leaner painting medium for under-painting before completing the painting using CPLO.
Zest-it Cold-Pressed Linseed oil can be thinned with Zest-it Oil Paint Dilutant and Brush Cleaner (Diluent) or Zest-it Solvent (Citrus Free) up to 25% to make a leaner medium.

Available sizes - 125 ml; 250 ml; 500 ml and 1 Litre

Copyright© Jacqui Blackman 2009



low vocbio productno cfc's not animalsairplaneYes lorryYes  ferryYes


Back to Products


Copyright 1999 - 2023 © J. & T. Blackman Ltd. All Rights Reserved Worldwide.
The information contained herein is the Intellectual Property of Jacqui Blackman and
J. & T. Blackman Ltd., and is supplied without liability for errors or omissions.
Zest-it ® and its logo are Registered Trademarks.
No part may be reproduced or used except as authorized by contract or other written permission, unless stated otherwise.
The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied.