Pigment Classification: Synthetic Organic Color Index Name: PY83(HR70) Color Index Number: 21108 Chemical Description: Diarylide Yellow HR70 Opacity/Transparency: Semi-Opaque Lightfastness Rating: 1 Permanency: Excellent Munsell Notation Listing: Hue 7.7 Y Value 7. Chroma 14.4 Gloss Average: 75.8 Viscosity Range: 4000-15000 CPS CIE L*a*b* Values: L*75.42 a*33.41 b*83.26 Tint Strength: 89.81
OPEN Acrylics are a slow-drying paint with a slightly softer consistency than our Heavy Body paints. The increased working time of these colors expands their range to include more traditional techniques once only possible with oils. Thick applications can dry extremely slowly, so we recommend artists only use OPEN Colors thinly (< 1 mm). Drying time can also be accelerated by mixing OPEN with faster-drying acrylics like our Fluid and Heavy Body colors. The slow-drying capability of OPEN Acrylics also makes the suitable for some printmaking techniques.
Because OPEN Acrylics dry slowly, painters who cover their palettes or use sealed containers have been able to use the same colors for weeks, reducing the amount of paint wasted and preserving color mixtures for future use.