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- ISO Grey Scale
For assessment of change in colour and staining in colourfastness testing 1-5 steps with half steps, in wallet.
What is the concept of grayscale?Grayscale is a range of shades of gray without apparent color. The darkest possible shade is black, which is the total absence of transmitted or reflected light. The lightest possible shade is white, the total transmission or reflection of light at all visible wavelength s.Who owns gray scale?
Grayscale parent company Digital Currency Group announced in October that it would buy back up to $1 billion of the trust on the market. DCG said it had already bought back $388 million worth of shares
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