| 摘要 |
PURPOSE:To provide a simple method for cleaning oil film, thereby cleaning hardly removable dust or oil film stuck to the corners of a glass article such as eyepieces. CONSTITUTION:The title method comprises coating the portion stained with oil film with an aqueous solution containing a dispersant and sodium alginate and applying an aqueous solution containing KCl and/or CaCl2 onto the aqueous solution used for the coating. |
