[Hui Cong manages network of general articles for use] This level is comfortable the tap water of the liquid ink that is pigment at having dye of water-solubility of harbour lay aside and device of metallic pen point.
1 classification and level
Gold fountain pen of cent of 1.1 fountain pen and iridium-point pen two kinds. Needle of gold fountain pen is made with golden alloy, most advanced solder has pen point alloy of platinum a group of things with common features, iridium-point pen needle is made with stainless steel, most advanced solder has pen point alloy of platinum a group of things with common features or wear-resisting hard alloy.
1.2 iridium-point pen divide iridium-point pen of tall difficulty class and common iridium-point pen two kinds.
2 technologies ask
The index of 2.1 various fountain pen must accord with regulation issueing a list:



