It does contain starch
Starch is used in only a few grade of paper and it is about 1 to 2% by weight
starch starch
starch,
starch!
When iodine touches starch it turns black. The paper may contain starch.
To hold it together.
glue, tape, staples, paperclips, and sometimes the sap of trees.
Paper that is free of Carbohydrates. Mostly the folks interested in Starch free Paper are currency counterfeiters, due to the fact that Iodine based detection pens will be rendered ineffective.
They both contain linked chains of glucose molecules, starch being less complex than the cellulose fiber found in paper.
The test of starch by covering the black paper and keeping it into a light place at few hours.
starch free paper.