柿 KAKI is a persimmon, 渋SHIBU means astringent.
 
Produced in Japan
Packed in a resealable packaging with instructions.
 
Kakishibu is both a tannin and a dye made from unripe persimmon fruits. The fruits are picked when they are at the highest level of tannin content, crushed and fermented. The juice is then concentrated and ground into a powder with almost 95% tannin content.
 
This dye was produced in many places throughout Japan dating back to the 13th century and used in many ways such as dyeing fabrics and fishing nets, in finishing wood works, to stencil paper and in the production process for Japanese sake. Kakishibu tannin on fabrics is non-toxic and it makes it water-resistant, antiseptic, insect repellent and mildew-proof.
 
Like henna, kakishibu is an oxidation tannin, becoming darker under UV light from the sun. The final shade depends on how many layers you have applied, but will be between a tan and a deep orangy brown. Post mordanting with ferrous sulfate will give deep grays to black.
 
Store in a dry, cool and dark place.
 
How to prepare your kakishibu dye;
10 grams - mix with 330 ml of tepid water.
25 grams - mix with 825 ml of tepid water.
50 grams - mix with 1650  ml of tepid water.
 
Let this mixture sit for 24 hours.
After a while a slight scum will rise to the surface and it will need to be stirred.
Always stir before using.  
Refrigerate in a clearly marked and closed container when not using.
 
Application on fabric;
Soak fully scoured and pre-wetted textile for 30 minutes in cold dye bath or apply with a brush. Dry the fabric in the shade. Once dry, hang in the sun to get darker color. Rotate the cloth to get even sun exposure.
The fabric can be smelly after dyeing but that will fade soon. 
Repeat process if needed, keep in mind the fabric will become darker over time.
Fabric may appear stiff after the dyeing process, that is easily solved by a light wash.
 
Kakishibu dye does not work according to WOF, you can use the entire batch of dye you have prepared, until it is finished. 
 
Application on wood;
Smooth the surface with sandpaper before applying kakishibu.
Brush along the grain of the wood. Use a cloth to wipe the wood if the surface has bubbles. 
Let dry between coats.
 
Active dye components; condensed tannins, gallotannins, catechin and shibuol.
 
Read more about kakishibu in this blog.