ISO/IEC 22505:2019 情報技術—モノクロインクジェットプリンターおよびインクジェットプリンターコンポーネントを含む多機能デバイスのインクカートリッジの歩留まりを決定する方法 | ページ 6

3.1

fade

phenomenon in which a significant reduction in uniformity occurs due to ink depletion

Note 1 to entry: In this test, fade is defined as a noticeably lighter, 3 mm or greater, gap located in the text, in the bar chart, or in the boxes around the periphery of the test page (3.9) . The determination of the change in lightness is to be made referenced to the 25^th page printed for each cartridge in testing. For examples of fade, please consult Annex A.

Note 2 to entry: In some printer systems, fade can occur prematurely due to the way that ink is provided to the printing system. If a printer exhibits fade, a five-minute pause is allowed to provide for recovery of the ink delivery system and printing can continue. If fade appears on the next page, then the cartridge is judged at end of life (3.7) and the additional page printed is not counted in the yield calculation. If fade does not appear on the next page, then printing can continue until the next fade or ink out (3.6) is encountered and the additional page shall be counted.

3.2

streaks

very thin lines of colourant or missing colourant, other than intended in the test document

Note 1 to entry: Streaks differ from fade (3.1) in the width and severity of increase in lightness, L*, or reduction in density. Streaks can appear due to a number of reasons, thermal issues and clogged nozzles being two of the main causes. If these streaks occur in three consecutive test pages (3.9) , then a streak removal operation (3.2) is required. For examples of streaks, please consult Annex B.

3.3

streak removal operation

procedure used to restore the print performance by removing streaks (3.2)

Note 1 to entry: If streaks are observed on 15 consecutive test pages (3.9) , first the printer can be left idle for five minutes. Then an additional 15 test pages are printed. If the streaks are still observed, then a streak removal operation is conducted according to the latest printer manufacturer documentation. Due to the significant amount of ink that is used for cleaning, the maximum permissible number of times that the streak removal operation can be used on a given cartridge is prescribed in 5.2.2.

Note 2 to entry: All test pages printed during this process are included in the page count for determining the yield.

3.4

printhead alignment operation

function that aligns newly installed printheads

Note 1 to entry: If it is mandatory according to the latest printer manufacturer documentation, this operation is performed during testing. The pages used in the alignment procedure are not counted in the measurement of yield.

3.5

ink low

warning generated by the printing system when it has determined that the amount of ink is such that a cartridge change may be required soon

Note 1 to entry: It does not indicate that the system is out of ink.

3.6

ink out

signal generated by the printing system when the useable ink in the system is depleted and the printer stops printing

3.7

end of life

condition determined by one of two mechanisms: fade (3.1) or ink out (3.6)

Note 1 to entry: In the event that the printer can continue printing after ink out is reported, the cartridge is still considered at end of life.

3.8

monochrome inkjet printer

printer only capable of printing black and not configurable to print another colourant

Note 1 to entry: More than one black cartridge can be installed simultaneously if they have the same cartridge identifier.

3.9

test page

test file that is printed as a single job

Note 1 to entry: The test page refers to ISO/IEC 19752.

3.10

individual cartridge yield

value determined by counting the number of test pages (3.9) printed between cartridge installation and end of life (3.7)

3.11

declared cartridge yield

value at or below the lower 90 % confidence bound of the mean as prescribed in 6.1

3.12

non-colourant ink

material designed for liquid state deposition on a substrate, such as gloss optimizers and fixatives, not containing a colourant

3.13

black ink cartridge

cartridge containing black colourant and no other colourant

Note 1 to entry: Black ink cartridge may contain non-colourant ink (3.12) .