230201 1NL82A1X(T1): http://farbe.li.tu-berlin.de/AET4/AET4.HTM or http://color.li.tu-berlin.de/AET4/AET4.HTM

For this page, see AET4 in English, AGT4 in German.
For the previous similar page, see AET3 in English, AGT3 in German.
For the next similar page, see AET5 in English, AGT5 in German.

For the corresponding image page with 10 colour series, see AETS in English, AGTS in German.
For the previous image page, see AESS in English, AGSS in German.
For the next image page, see AEUS in English, AGUS in German.

TUB-Test chart AET4; CIELAB colour differences, CIE 230:2019
logarithmic ordinate for CIELAB lightness L*,
derivation dL*/dY, sensitivity dY/Y, and contrast Y/dY

Figure L0N1: Output layout of page 1 of the file AET4L0NP.PDF with the format A6, see
AET4L0N1. PS / TXT / jpg / PDF
and the format A4 in the following tables.

One page, orientation A4L, Intended for PDF output, No linearization or transfer	One page, orientation A4L, Intended for PS output, No linearization or transfer
AET4L0NP. PS / TXT / PDF	AET4L0NA. PS / TXT / PDF

One (multipage) picture (left side)	One (multipage) picture (right side)
AET40-7R. PS / TXT / PDF	AET41-7R. PS / TXT / PDF

One picture of one page (left side)	One picture of one page (right side)
AET40-7N. PS / TXT / PDF	AET41-7N. PS / TXT / PDF