lightfast

The most stable painting medium is pastel, but modern lightfast watercolors are now more stable than oil or acrylic mediums.

Lightfastness in Pencils, Watercolors, and Oils James Gurney 2010

The ratings range from Class I (very lightfast) to Class V (very fugitive).

Lightfastness and Alizarin Crimson James Gurney 2010

James, in your experience have you found if different materials the pigments are placed on Paper, canvas, etc make a difference with how lightfast they are?

Lightfastness: Markers James Gurney 2010

I often use ballpoint so am always on the lookout for a good, archival, lightfast ballpoint pen.

Lightfastness and Dyes James Gurney 2010

I would guess that as compounds are made to be more lightfast that they tend also to be harder on the environment.

Lightfastness and Dyes James Gurney 2010

I wonder about the environmental and toxicity dimensions of the quest for lightfast dyes and pigments.

Lightfastness and Dyes James Gurney 2010

The most lightfast pigments around are the iron oxides, which are harmless to the environment.

Lightfastness and Dyes James Gurney 2010

The ratings range from Class I (very lightfast) to Class V (very fugitive).

Archive 2010-04-01 James Gurney 2010

" I would guess that as compounds are made to be more lightfast that they tend also to be harder on the environment."

Lightfastness and Dyes James Gurney 2010

On many graphic art products, such as inks or felt-tipped markers, it really means “waterproof,” rather than “lightfast.”

Archive 2010-03-01 James Gurney 2010