FLUX-BRUSH STYLE PEN: THIS IS A PEN WHICH CONTAINS A FLUX MATERIAL WHICH AIDS THE SOLDERING PROCESS. THE ROLE OF A FLUX IN A JOINING PROCESS IS TYPICALLY DUAL: DISSOLVING OF THE OXIDES ON THE METAL SURFACE, WHICH FACILITATES WETTING BY MOLTEN METAL, AND ACTING AS AN OXYGEN BARRIER BY COATING THE HOT SURFACE PREVENTING ITS OXIDATION. FLUXES FOR SOFT SOLDERING ARE TYPICALLY OF ORGANIC NATURE.

GENERAL INTERPRETATIVE RULES 1 & 6 TEXT TO CODES 3810, 3810 10, 3810 10 00 HARMONISED SYSTEM EXPLANATORY NOTES TO HEADING 3810 IN PARTICULAR NOTES TO 3810 PARAGRAPH (2) APPLICANT'S DECLARATION