SPECIAL KIND OF INK

Special Kind of INK:

1. INVISIBLE INK - Sympathetic Ink. Made from salt of metals. Others made with mixture of milk and lemon juice which turn brown when heated.

Invisible INK appeared on paper when heated. When chemical reaction is supplemented to see color

2. RUBBER STAMP INK - Moist when on its ink pad. This ink dries fast once it touched the paper.

3.COPYING INK - Ink found in carbon paper. Mimeographing and duplicating machines need this ink

4. MARKING INK - Made esp. for wood and fabric (textile)

5. RECORDING INK - Ink used in this medium is mixed with glycerol to keep from evaporating. Significant use for SEISMOGRAPHs - EARTHQUAKE DETECTORS

IMPORTANT FACTS:

ROMANS have their INK from black fluid thrown off by the cuttlefish when its frightened. Sounds ridiculous or a myth. It's up to you to believe that.

SEPIA INK - Dries dark brown on surface of paper

MEDIEVAL - Black and blue ink

Other Sources of INK : Crushed galls, oak galls, mixed with iron salt, copper and green vitriol, berries from variety of plants