Custom Brush transparency looks off on certain black background

hi there,

 

i made custom brush starting analog tools, scanning etc. going photoshop make brush. i'm supposed use corporate colours , brush red , background black (c0 m0 y0 k95).

 

when paint brush on corporate black (cmyk95) transparent parts of brush orangey , doesn't crisp.

 

but when paint brush on black has colours values i.e. c40 m40 y40 k100 brush looks how want, crisp , clean.

 

but can't change corporate colours , don't understand why brush behaves differently on these different blacks. document file set cmyk, same problem occurs in illustrator when export brush-stroke transparency , importing it.

 

does have solution?

 

any appreciated. thanks!

 

screenshots

 

 

if have example 100% magenta , fade softly 100% black in cmyk image there bound part resulting color 50% magenta , 50% black – looks quite different in color space has true black.

you work in cmyk have accept shortcomings.

edit: not mean working in cmyk can not called in cases, subtractive colors , additive colors behave differently.

 

one manually add trapping (with layer style example) there other problems: desaturated part pushed outwards or mixed color might darker »black« …

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