Most Viewed

- Browns And The Cold Semi-neutral Grays Marrone Is Practically To
- Also Called Scarlet Chrome Is A Bright Chromate Of Lead Of An
- Black Chalk
- Composition Chemical Analysis Has Shown Several Of The Blues To Be
- Burnt Verdigris
- Belong The Dutch And Flemish Schools; The Sensible Which Aims At
- Less Known As English Red Prussian Red And Scarlet Ochre True
- Olive In Dark Green; Russet And Citrine In Dark Orange The
- Known Likewise As Raw Sienna Earth Terra Di Sienna &c Is A
- Root Of The Anchusa Tinctoria Commonly Known As Alkanet A Plant

Least Viewed

- Distilled Verdigris Or More Properly Refined Verdigris The Best Is
- Uniform Colour Thus Composed Is The Citrine Colour Of Fruit And
- Sometimes Called China Or Chinese Ink Is Chiefly Brought From
- Their Chief Source The Greens Consist Of Yellow Mixed With Copper
- Egypt The Greeks Obtained The Knowledge Of Their Ars Chromatica
- While We Avoid The Compounding Of Contrasting Colours That Is The
- Only That Of Extreme Light Objects Opaque It Follows That White Is To
- Secondary Colours Are Three Only Orange Green And Purple
- Colours With The Neutral Black Of The Various Combinations Of Black
- Have To Be Learnt For Each Pigment Has Its Own Peculiar Habitudes

Cobalt Prussian Blue

Gmelin states that yellow prussiate of potash yields with a solution of
oxalate of sesquioxide of cobalt a blue resembling Prussian blue--that,
in fact, there can be obtained a Prussian blue with a base of cobalt
instead of iron. In the moist state, the similarity is sufficiently
great, but when washed and dried, the product is, with us, a dingy slate
colour. Possibly, if such a blue could be produced, it might exceed in
permanence the ferro- and ferri-cyanides of iron. Of course the compound
would be much more expensive.





Next: Copper Blues
Previous: Blue Ochre

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