| 摘要 |
<p>The spray head (1) is particularly used for application of suitable media for removal of graffiti (G) from a wall (M) and comprises a box-shaped housing with an open underside, together with a mouthpiece which issues inside the housing. The spray head is controlled by an operator (B). In the wall is a pane of glass (R). A suitable spray medium is powder-form and crystalline, which contains a powdered or g ranular adhesive medium. The crystalline material contains one or mroe salts, preferably calcium carbonate with a granular size between 0.25 and 0.6 mm. The application pressure of the spray medium can be between 0.5 and 3 bar.</p> |
