Lightfastness Test Criteria

Lightfastness Test Criteria for Epson Stylus PHOTO Printers

(Indoor Display Conditions)

Light Source: Fluorescent Light
Intensity: 70,000 lux
Temperature: 240C
Humidity: 60%RH
Glass mount: 2mm, soda lime
Fade criteria: Pure YMC 30% loss at OD = 1
Display-life calculation: Total illuminance / (500lux x 10 hours x 365 days = 1 year)

Lightfastness rating is developed and conducted by Epson using accelerated testing of prints on specialty media, under fluorescent light (indoor display conditions) with glass mount. Click here for a detailed explanation of the tests).

Temperature, humidity and some atmospheric gases may also affect the rate of fading, especially when humidity is high. The estimated lightfastness period does not indicate the colour changing or the durability of the paper itself. Epson does not guarantee longevity of prints. Epson recommends that your prints be stored in a photo album (or plastic photo storage box) or in appropriate sleeves commonly available from most camera shops.

After printing, approximately one day will be needed to settle the colour. The colour just after being printed may change as the print dries. This change is not caused by light.

For detailed information on Lightfastness Testing criteria, click here.