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Blockx Soft Pastel - Dioxazine Mauve 313

Soft Pastel

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$6.16

Blick Art Materials · recorded Oct 21, 2026, 5:07 AM UTC

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Product details
Blick SKU
21918-3313
About this product range

Blockx Soft Pastels are handmade in Belgium using pure pigments in the same tradition started by company founder and chemist Jacques Blockx in 1844. Four subsequent generations of Blockx family members have combined traditional methods with modern chemistry to create artist's colors that are pure, permanent, lightfast, and stable.

Colors are named in such a way as to make it easy for artists to choose the exact shades they need. For example, Apple Green's five shades are: Apple Green 641, Apple Green 642, Apple Green 643, Apple Green 644, and Apple Green 645.

If the color name ends in:

  • 1 — the pure color is upgraded with black
  • 2 — this is the pure color
  • 3 — the pure color is tinted with white
  • 4 — the pure color is tinted with more white
  • 5 — the pure color is tinted with much more white

These watersoluble pastels are soft and velvety in texture, possess a superb tinting strength, and will draw on any surface, although they're best-suited for pastel paper.

Individually wrapped pastel sticks are 2-1/2" L x 1/2" Dia (65 mm x 12 mm).

Pigment information

General reference notes about pigments can describe other media (such as oil). They do not verify this product’s exact formulation or behavior.

Dioxazine Violet

Pigment code
PV23
Type
organic
Chemical name
carbazole dioxazine
Chemical formula
C34H22Cl2N4O2
Properties
Dioxazine Violet is transparent and has very high tinting strength. It is a staining pigment, very dark valued when it is used at full strength. Concentrated, it paints out nearly black, but it mixes with Titanium White to form bright, opaque tints of purple. PV23 produces slightly redder shades than PV37. Because the hue can vary with the conditions of preparation and grinding, it may be offered in red shade, blue shade, and so forth.
Permanence
Dioxazine Violet has good lightfastness. There may be some concern about it fading or shifting in color in tints and washes. Some artists have reported that PV37, a molecular variant, is more lightfast than PV23.
History
Two molecular variants of Dioxazine Violet, PV23 and PV37, are available. They have similar properties, but mix slightly differently.
Description
Dioxazine Purple, Chromothal Violet, Mauve, Carbazole Violet.

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