... -32FAntiflame type 3 .Technical requirement 3.1 Outside appearanceA.The end face of foil covered board should be tidy without any delamination ... nick, pitting and glue spot on the copper foil covered face is not allowed. Any color changing or dirty can be ... /cm3 hydrochloric acid or proper organic solution.C. On laminated face, the defects such as bubble, impressed pitting, nick and glue ...