'SSIC - Standard Subject Identification Code', All Acronyms, 17 January 2018, <https://www.allacronyms.com/SSIC/Standard_Subject_Identification_Code> [accessed 17 January 2018] Bluebook All Acronyms, SSIC - Standard Subject Identification Code (Jan. 17, 2018, 12:01 AM), available at https://www.allacronyms.com/SSIC/Standard_Subject_Identification_Code. CSE All Acronyms. SSIC - Standard Subject Identification Code [Internet]; January 17, 2018 [cited 2018 JAN 17].
Set your timer for 1 minute and wait. You can keep the etching cream on the glass longer and you will get a more intense etch, but the manufacturer (and I) suggest you start with the recommended 1 minute. When the minute is up, run the glass under luke warm water to remove the etching cream.
Place a pinpoint amount inside the tray for the teeth you wish to whiten. Brush teeth before inserting tray. Lightly tap tray to adapt tray sides to teeth. Wear Opalescence 20% for 30 minutes and Opalescence 35% for 30 minutes. Remove excess gel with a clean finger and then immediately rinse your fingers off. If significant sensitivity occurs, stop the treatment and consult the dentist. Clean tray with soft brush and cool tap water, then allow the trays to air dry.