Section 109(6) in The Orissa Registration Rules, 1988
(6)In Indexing registered documents and the papers referred to in Sub-rule (1) which relate to mineral and other products, e.g. mica, coal, lac, forest coppices etc., the work mica, coal or lac, etc., as the case may be, should be entered by red ink in cases of registered documents and by black ink in cases of the said papers in column-6 of Index No. II below the nature of transaction entered in the said column and in column 3 of Index No. IV below the entry as to the interest of the person in the transaction made in his column.