This material was invented by the Hyatt brothers in 1864 and is made from cotton, alcohol, camphor. The entire process to reach a workable material lasts from 4 to 8 months depending on the thickness. In fact the drying process is very important. Pens made in celluloid are made by two main process:
Both processes have advantages and disadvantages.
Easy to color, allows many colors and designs. Its composition is totally anallergic, it partially absorbs humidity from the hands, so it feels smooth and comfortable. Shock absorbment (Technical : resilience) so it is an excellent material for pens.
During manufacturing can be easy flammable and the process requires adequate precautions, it becomes soft at only 70 degrees. Constant exposure to light can cause abnormal drying and can becomes fragile! As in this case of some vintage pens.
Store in dark ventilated place at not more than 25/30 degrees.
Silicon sponge like those use to clean shoes.