            |
| UVA | UVB | UVC |
| - almost not retained
by the atmosphere
- not stopped by the creams - not stopped by glass - lamps solar |
- retained à.70.%
by the atmosphere
- decrees partly by the creams - decrees by glass - eliminated from certain solar lamps; |
- filtered by the layer of ozone or collected by the atmosphere (dust, fume, vapor, clouds). |
| Long-term action:
- on the level of the skin: - heat without burning stimulate production of mélanine - > tanning - on the level of derme: destroy collagenous fibres and elastin _ > premature ageing of the skin; attack ADN - > cancers cutaneous |
Immediate action
on the level of the skin:
- burn (sunstrokes) - stimulate production of mélanine - > tanning - attack ADN - > proliferation of the mélanocytes (melanomist) |
