By definition, blushing (also known as blooming) is when the conformal coating appears to be blotchy, milky, or cloudy.
Some problems of blushing include
- Surface tackiness or greasiness
- Incomplete cure
- Poor adhesion
- Poor adhesion on over-coating
- Coating discoloration over time
- Poor gloss retention (matte finish)
Environmental conditions could be a factor that influences blushing in conformal coating.
This can be caused by the absorption of carbon dioxide and water into the conformal coating film.
To find out more, click Conformal Coating Defects: Blushing
Who is Nexus?
Nexus brings together the accumulated knowledge of a group of conformal coating and electronics material dispensing consultants who provide a unique service, focused on helping electronics manufacturing clients improve their conformal coating and electronics materials processes.
Nexus operate across North America, Europe and Asia and can provide a unique perspective to the rapidly growing conformal coating and electronics materials industry. Expertise is held in liquid and parylene coating, capital equipment sales and specifications and material, equipment and process specification, troubleshooting and training.