Maintenance in the use of the iridium fountain pen：
    • 1. Clean pen absorption system with warm water.
    • 2. Use Picasso brand ink, do not change different ink frequently. Different brand ink have different composition and formula, mixed them may have chemical reaction and will have  subsidence which will block the ink system, so before change the different brand ink, please clean the ink then use the new one. Use front nib to write, if not write correctly it will cause not write smoothly or branching the nib.
    • 3. Do not write on waxy paper; Carbon ink easy to have crystal block the ink come out, so before use carbon ink, you need wash  the pen one time a week to make sure the ink can come out freely. If not use for a long time, clean it, otherwise when next time you use it, there will be something block the ink system.
    • 4. Do not put the pen in the environment over 70 degree or put in alcohol organic solvent, do not touch acid or alkaline solvent to avoid pen barrel paint drop or oxidize.
    • 5. Do not disassembly the ink system to avoid part drop or be destroyed.
    • 6. Absorb the ink from the nib, do not absorb the in by the converter; when absorb the ink, pen nib and tough should dip in the ink, then the ink can absorb in the pen, after absorb, clear by soft cloth or paper.
    • 7. After use, put the cap on to avoid the ink dry and also it can protect the nib.