Patent ID: 7998592

Claim:
A recording paper used for an electrophotographic system, wherein the recording paper is obtained by using starch treated with at least one of (1) methods that use starch wherein a molecular weight reduction and resulting viscosity regulation is achieved using enzymes, (2) methods wherein for those cases where oxidized starch is used, an oxidation treatment is conducted gradually using potassium permanganate or the like, thereby oxidizing any terminal aldehyde groups to carboxyl groups, and (3) methods wherein for those cases where the oxidized starch is used in surface sizing, a pH of the size press coating is held at about 9 to about 12, thereby retaining the aldehyde groups within the oxidized starch in salt form; and in a gas chromatograph generated using a headspace method by holding two pieces of the paper of dimensions about 1 cm×about 1 cm at about 120° C. for about 3 minutes, a quantity of aldehyde compounds generated having a straight-chain alkyl chain of about 5 to about 20 carbon atoms is equivalent to a peak surface area ratio of no more than about 65% and a peak surface area of no more than about 40,000.