Foremost among these on the price lists are Brewster greens, bronze greens, Brunswick green, Merrimac green, olive green, fern green, etc. There being any number of greens of these types, it would be idle to weary the reader with many formulas, therefore, we shall confine ourselves to give only one for each type and that of a fair medium shade, from which the color grinder may obtain an idea of the pigments required to produce the effect desired, and by varying the quantity of light and dark colors, obtain lighter or darker shades. Take for instance, Brewster green, which has all along been a great favorite in coach and carriage painting. In this green it is necessary to use a good portion of yellow lake, but this being too expensive, excepting where cost is no objection, Dutch pink is substituted for the lake; however, this material should be of a higher type than the ordinary. The grade known as English Dutch pink, that is usually furnished in large drops, which is really made from the waste liquor of yellow lake, will produce best results. To produce 100 pounds of such a green in japan, with a rich tone, mix thirty pounds Dutch pink, powdered; eighteen pounds ivory drop black, eight pounds Prussian or milori blue, with little if any bronze cast, five pounds orange chrome yellow, with forty-two pounds color grinders' japan or gold size japan, grinding the batch on a twenty-inch water cooled stone mill to the standard fineness. This will produce a green of good body, that when applied to a coach or automobile body, striped with deep orange or imitation of gold color and glazed over with yellow lake in varnish, will give a most beautiful effect. By reducing or increasing the percentage of black and blue, lighter or deeper shades will be obtained in similar tone of color. If it is for any reason inconvenient to mix the dry pigments in the japan and go to the trouble of grinding a small batch, the result may be obtained by mixing thirty-five parts by weight of ivory drop black in japan, forty-two parts by weight of Dutch pink in japan, sixteen parts Prussian or milori blue in japan and six parts orange chrome yellow in japan, adding a few parts gold size japan to make the mixture smooth and giving it a run through the mill to break up any grainy appearance that may develop in the mixing.
To produce a medium shade of bronze green in japan, a mixing may be made of forty pounds ivory drop black, ten pounds medium chrome yellow and six pounds orange chrome yellow, with forty-six pounds of color grinders' japan, yielding 100 pounds finished color, when ground fine in a twenty-inch water cooled stone mill; or in small batches it may be made by mixing eighty parts by weight of ivory drop black in japan, twelve parts of medium chrome yellow in japan and eight parts of orange chrome yellow in japan, smoothing the color by giving one run through the mill, as in the case of Brewster green. By omitting part of the yellows and increasing percentage of black, a darker color is obtained, while by decreasing the black and correspondingly increasing the yellows, a lighter color is had. When a colder tone of bronze green is desired, it will be produced by the addition of a small portion of Prussian blue and when the orange chrome yellow in above formula is omitted and lemon chrome yellow substituted in its place, a type of green, known as Quaker green is obtained. Lampblack, however, must not be used in grinding any composite green in japan. Brunswick green in japan is not to be confounded with what is known under that name in Europe. It is a very dark green, almost black, and strong light is necessary to distinguish it from the latter, unless the two are side by side. It has been quite a favorite with some railways for the painting of their locomotives and is also used extensively for the painting of stationary engines, pumps, etc., but there is no standard for this color. Some color grinders have made it by simply adding chrome yellow or chrome yellow and Prussian blue, while others added chrome green to ivory or drop black, others again using carbon black and chrome green. We should suggest a mixing of forty-six parts ivory drop black, four parts chemically pure chrome green of deep shade blueish type and fifty-three parts color grinders' japan for a 100-pound batch, to be ground in a water cooled mill or mixing, say ninety-four pounds ivory drop black in japan with six pounds chemically pure chrome green deep in japan. This green is also of the same type as Russian green in japan.
Merrimac green is somewhat similar in composition to Brewster green, but more blueish and deeper and very seldom listed in more than one shade. It is of a sort of bottle green effect in its general tone and has been quite a favorite for painting moderate priced vehicles. A good average formula for a medium shade is as follows: - Thirty-five pounds Dutch pink, twenty pounds chemically pure chrome green, deep shade; twelve pounds ivory drop black and thirty-five pounds color grinders' japan will produce 100 pounds finished color when ground in a twenty-inch water cooled mill.