using ink

Water hyacinth As Boardmarker Ink

Preface Water hyacinth is a water plant with the characteristics of hollow stems and rooted sert. Water hyacinth is often regarded as a weed because of its rapid vegetative growth and masking the underwater life process from the sun, causing a decrease in the oxygen solubility rate in the waters. Many people complain about the…

Utilization of Tea Bag Residue As Safe Ink and Environmentally Friendly

Preface The role of ink today can not be separated from everyday human life from art, journalism, to the printing industry, all in need of ink, although at first seem trivial (Williams, 1988). Inks began to be used by people from the 3rd to 4th centuries AD by the Romans during the use of pen…

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