Starting from platinum, the following are all brands with average or even single product richness. Shirokane is one of the top three stationery manufacturers in Japan, along with Shuraku and Bairaku, and mainly produces fountain pens, ballpoint pens and activity pencils, with an annual production capacity of 20 million pieces. As an ancillary product of the fountain pen, the platinum fountain pen ink still covers dyes, pigments (carbon) and iron galls, except for the iron gall ink, which has 6 colors that are considered a surprise, and the other products are relatively poor.
 
白金是目前唯一生产铁胆墨水的Japan品牌，经典墨水INKK-2000系列采用传统的铁胆墨水配方制作，下笔后字迹迅速由亮转黑，所选的紫、红、绿、黄、深浅棕色都非常沉稳，由于采用传统配方，腐蚀性比R&K中性的Dokumentus档案墨水系列强，而且存放稳定性不佳，时间一长会产生沉淀，上墨时需注意不要吸入。
 
Platinum also has the INKG-1500 series of ultra-fine particle pigment inks, which are similar to Shule, which grinds the pigment particles to the nanometer level to prevent pen clogging. However, it is clear that Platinum did not attach importance to this type of product in the form of music, or that the technology did not reach the common point of all pigments, and only produced four colors: rose, blue, tan and carbon, which dwarfed the circus story of Writing. Platinum pigment ink is more than 100 yuan, the same price as Writing, but more than 10ml, it is good to do a substitute for Writing Le Ji Black and Green Ink, red ink is closer to the positive red for correction homework and business, it is also written without music, plus good fluidity, good lubrication effect, if you do not dislike the appearance of the platinum bottle, you can choose to do Writing Music substitutes.
 
The dye ink of white gold is lackluster, obviously the most playable small category, but there are only 8 colors, focusing on fluidity, resulting in a strong paper and not particularly eye-catching.