ANTIMICROBIC PENCIL Russian patent published in 2015 - IPC B43K19/12 A61K35/10 A61P31/10 C09D193/00 

FIELD: biotechnologies.

SUBSTANCE: pencil contains emulsion or white wax, vegetable oil and the substance preventing growth and development of microorganisms. The named substance of the pencil is amber, propolis, pine thus or their mix. Amber is used in the form of solution of particles with the size 0.6-5 mcm in vegetable oil at the mass ratio 1:3. Ratio of components is as follows, in wt %: the named amber 30-50, propolis up to 6, pine thus up to 20, while or emulsion wax - the rest. At preparation of composition the solution is homogenised in ultrasonic field with the power density 1-10 W/cm³ and with the frequency 22 kHz within 10 min.

EFFECT: pencil has no the pronounced flavour, it does not contain volatile or aromatic substances and provides protection of various surfaces against the biocorrosion caused by bacteria and mould mushrooms including in sealed premises.

1 tbl, 11 ex