Standard of Japan Electronics and Information Technology Industries
AssociationDigital Color Photo Print Stability Evaluation
JEITA CP-3901
1. Overview
The improvements of the image quality and the image permanence have the remarkable ones
after consumer printers are put on the market, and each company had started announcement theirperformances as product’s merit. On the other hand, ISO has been discussing the method ofevaluating the permanence of the digital image photos continuously, but the publication time is notpredictable. Under the circumstances, it was judged that JEITA should make its standard of themethod of evaluating the permanence of the digital image photos in order to contribute theevolution of the technology and for the users who want to compare the permanence. JEITA had
composed PG of the persons related to the industry to discuss it repeatedly, and came to publish
the CP-3901 " Digital Color Photo Print Stability Evaluation" CP-3901.

2. Items specified in this standard
Following contents are described,

1.

Scope

2.

Normative references and bibliographies

3.

Terms and definitions

4.

Sample preparation

4.1

Life prediction target

4.2

Image target

5.

Density measurements

5.1Definition of density terms

5.2

Density values to be measured

5.3

Colorimetry

6.

Method for estimating life expectancy

6.1

Test conditions when calculating life expectancy

6.2

Endpoint

7.

Test methods - Light Stability

7.1

Scope

7.2

Equipment and test conditions

7.2.1 Light source
7.2.2 Illuminance7.2.3 Optical filter
7.2.4 Temperature and humidity
7.2.5 Other precautions
7.3

Measurement

7.4

Calculation of life expectancy

7.4.1 Provision for endpoint
7.4.2 Standard Illuminance for calculating life expectancy
7.5Test reporting

8.

Test methods - Ozone Stability

8.1

Scope

8.2

Equipment and test conditions

8.2.1 Test chamber
8.2.2 Gas supply method
8.2.3 Gas concentration control method
8.2.4 Gas concentration measurement method
8.2.5 Gas flow rate control method
8.2.6 Sample setup method
8.2.7 Temperature and humidity
8.2.8 Gas concentration
8.3

Test procedure

8.4

Measurement

8.5

Calculation of life expectancy

8.5.1 Provision for endpoint
8.5.2 Standard concentration for calculating life expectancy
8.6

Test reporting

8.7

Safety precautions when performing tests

9.

Test methods - Thermal stability

9.1

Scope

9.2

Sample characteristics and test conditions

9.3

Standard conditions (I), ISO-compliant conditions (ISO 18909 compliant, where test
temperature is ≥20°C and endpoint is as provided)

9.3.1 Test chamber
9.3.2 Test humidity
9.3.3 Test temperature
9.3.4 Test method
9.3.5 Method of storing samples after testing
9.3.6 Measurement
9.3.7 Calculation of life expectancy
9.3.7.1

Provision for endpoint

9.3.7.2

Calculating life expectancy using Arrhenius equation
Standard conditions (II), JEITA-compliant conditions (test temperature is ≥20°C and9.4

endpoint is as provided, or when a half or one-third endpoint is used)
9.4.1 Test chamber
9.4.2 Test humidity
9.4.3 Test temperature
9.4.4 Test method
9.4.5 Method of storing samples after testing
9.4.6 Measurement
9.4.7 Calculation of life expectancy
9.4.7.1

Provision for endpoint

9.4.7.2

Calculating life expectancy using Arrhenius equation

9.4.7.2.1 Basic method using the endpoint of 6.2
9.4.7.2.2

Method for shortening the time when a long time is required to reach the specified

endpoint (the 1/2 endpoint method)
9.4.7.2.3 Method for shortening the time when a long time is required to reach the specified
endpoint (the one-third endpoint method)
9.5

Test reporting

10.

Test reporting

10.1

Reporting of sample preparation

10.2

Light stability test

10.2.1 Test reporting of standard condition
10.2.2 Test reporting of other conditions

10.3

Ozone stability test

10.3.1 Test reporting of standard condition
10.3.2 Test reporting of other conditions
10.4Thermal stability test

10.4.1 Test reporting of standard condition (I)10.4.2 Test reporting of standard condition (II)10.4.3 Test reporting of other conditions

Annex 1 (Informative)

References

Annex 2 (Normative)

Test Chart

Annex 3 (Informative)

Filters Used in Light Stability Tests

Annex 4 (Informative)

Digital Photo Print Durability Tests

Explanation

3. Remarks- 3.1 This standard is described only in Japanese.

Table: Summary of differences in content between the ISO standard being drafted and the JEITA
standard
Item
JEITA
ISO (as of the Washington
meeting of May 17, 2007)
Endpoint judgment criterion
30% OD loss
40％ OD loss(color portions)Endpoint judgment criterion
Difference in OD loss of 15%
Difference in OD loss of 20%(imbalance)
Portions used for endpointYMCK
YMCKRGB
judgments
Calculation of years of light
One level: 250 lux × 12 hours.
Two levels: 125 lux × 12 hours
stability&500 lux × 12 hours
Ozone life calculation
40 ppm•hr/year
50 ppm•hr/year
Light stability test method

UV-cut filter required
IR-cut filter optional

UV-cut filter optional
In reality the majority opinion isthat an IR-cut filter is required
Chamber temperature: 20 ±5°C Chamber temperature: 23±2°C
BPT ≤ 40°C
BPT 23 ±2°COzone stability test method
Gas concentration: 1-5 ppm
Gas concentration: 1-5 ppm±10%±0.1ppm(However, ±5% is underconsideration for aconcentration of 5 ppm)
Chamber temperature: 23 ±2°C Chamber temperature setting:23-27°C ±2°C
Thermal stability test method Can calculate provisional life
JEITA criteria are under study
expectancy using 1/2 or 1/3
endpoint judgment criterion forDminMinimum test temperature
Minimum test temperature
range: 15°C acceptable
range: ≥ 20°C
Test humidity
50%RH
Tentatively 50%RH (Some areproposing 65%RH, but 50%RH
is favored by the majority)
TargetFormat: BMP
Number of steps: 16
Tolerance for change frominitial density: 10%
Profile: Not used
Driver: Manufacturer's
recommended conditions

Format: Tiff s-RGB
Number of steps: TBD
Tolerance for change frominitial density:
Gray: 0.05, YMCKRGB: 0.10
Profile: Use
Driver: One that reproduces
close to original file