Ceramic Spray Sealers are final spray coatings that produce smooth, hard surfaces. They are used to brighten the colors and protect the finishes of objects decorated with nonfired color products.
How To Use
- Shake all aerosol products before using.
- Spray to side of object and move spray onto surface of object. Stop spraying only after you have moved spray off to side of object. Never start or stop spraying directly on object.
- Keep can in constant motion while spraying. A slow, even movement is best, giving better coverage and preventing runs and sags caused by spraying one spot heavily when you stop moving can.
- Most sprays perform best when held approximately 8” to 12” from object. However, this may vary with particular product and climate in your area.
- Always check directions on can. Holding can too far away will produce too light a coating. Holding can too close will cause sags or runs.
- Always try to attain wet, thin film on surface being sprayed and always spray directly head-on at object.
- Apply as many coats as necessary for desired effect; 2 light coats are better than one heavy coat. Remember to keep can moving once spray is hitting object. Do not stop spraying until you have moved spray off to side of object.
- Always start off object in upper left-hand corner and go back and forth in even, side-to-side motion ending in lower right-hand corner, letting each stroke come completely off object and overlapping each stroke approximately one-third. When finished turn object 90 degrees and repeat same procedure in opposite direction. This will result in very even, uniform coating.
- When spraying back and forth, hold can at same distance from object rather than swinging can in arc. When spraying round, sculptural or deeply relieved objects, spray in round, circular motion instead from side-to-side.
- Always spray directly (head on) at object, and from correct distance. Start spraying off surface of object and finish off surface of object.
- Most Ceramic Spray Sealers contain a “marble” (agitator ball) and should be shaken for one full minute after marble moves freely, and often during use. The marble acts very much like a stir stick in a conventional can of paint. In order to make sure all ingredients are mixed well together, shake can in circular motion so that agitator is rolling around sides of can.
- Before spraying any object, test spray on scrap surface to get “feel” of can and to make sure can is spraying properly.
- Weather can affect any aerosol product. If weather is very cold and cans are stored outdoors, allow cans to warm at room temperature before spraying. If weather is very hot and dry, holding can too far away (and sometimes, under extreme conditions, even distance recommended on can is too far away) can allow solvents in sprays to evaporate. When this occurs, spray dries before it hits object, forming small, white particles on object instead of a smooth, clear surface. In this case, you must adjust distance until you can achieve a “wet” thin film.
- If weather is very hot and humid, holding can too close will cause heavy coating and could accentuate “blushing” problem (milky appearance) on surface of object. When there is extreme humidity, some moisture may become trapped in spray film, causing milky white appearance. In most cases, blushing will go away within half an hour but should problem remain, simply wait until a less humid, clear day and respray. This should release trapped moisture by reopening surface and allowing it to evaporate, leaving clear, transparent film.
- Spray cans perform best when held anywhere from vertical position to 45-degree angle. To tilt can more than 45 degrees could cause sputtering or no spray at all. For this reason, when spraying flat surface, slant object at 45-degree incline and spray with can held at 45-degree angle also. This will allow a straight, head-on application.
- When spraying, spray button should be released from time to time, as holding button down for continuous periods may reduce temperature of can, resulting in lost pressure. This can be easily remedied by letting can stand for short period before continuing to spray. However, to prevent this from happening, develop habit of releasing spray button occasionally while spraying but remember, release only when spray is off to side of object.
- When spraying, always spread newspapers around to catch any overspray. A cardboard box with one end removed will make an excellent spray booth. A decorating turntable or banding wheel is also very useful when spraying round objects, allowing all sides to be covered without touching object.
- Spray cans have a dip tube, very much like a soda straw, that runs from spray button down to bottom of can. When not used for a long period of time, some product may seep up this tube and become somewhat hardened. When this happens, product in can is not harmed but spray button must be worked up and down a number of times, with can help upside down and sprayed until only clear gas escapes. This procedure will clear product from tube.
- To further correct spray can that is not spraying properly, first give spray button a quarter turn after wiping off any residue that might have accumulated around spray hole. If spray is still faulty, twist off button (spray head) from can. Using small knife blade, clean metering slot at bottom of spray head stem. Using a straight pin, clean spray hole. Reinsert spray head firmly into can, making sure spray hole is pointed away from you. Can should now spray properly.