What's the difference between bright red and true red? instructions

There is no difference between big red and true red. Big red is positive red.

Red: True red, the traditional China red, also known as crimson, is one of the three primary colors (the other two are yellow and blue).

Red wavelength: about 6 10 to 750 nm.

Red fault:

Scarlet, vermilion, purples, crimson, pink, orange, apricot, pink, peach, rose, rose, alizarin crimson, earth red, rust red, light pearl red, shell yellow, orange red, light pink, salmon red, crimson, red, crimson, burgundy red and grey rose red.

Attached drawings: 100-5388(JPG), 100-5385(JPG), 100-5386(JPG).