Basf Aktiengesellschaft

Basf Se Corporation

Benno Sens

Heinrich Hartmann

Bernd Bruchmann

Walter Denzinger

Knut Oppenlaender

Peter Erk

Bernhard Albert

Jin Mizuguchi

Arno Boehm

Andreas Stohr

Walter Kurtz

Joachim Jesse

Paul Guenthert

Hermann Birkhofer

Wolfgang Best

Juergen Kipper

Juan A Gomez

Matthias Klüglein

Alfred Rennig

Matthias R&auml;dle

Thomas Beuermann

Robert Kreuzer

Arno Böhm

Camiel Heffels

J&uuml;rgen Ettm&uuml;ller

Andres Carlos Garcia Espino

Reinhard U Roth

Andres C Espino

Black perylene pigments which comprise one of the isomers of the formula Ia or Ib in which

Black perylene pigments

The disclosure is a probelike apparatus ( ) for spectroscopic analysis of a fluid medium ( ) by attenuated reflection. Two light beams from a light source ( ) impinge upon the boundary ( ) between a prism ( ) and the medium ( ) to be analyzed and the intensities of the light beams reflected at the boundary are measured in a detector unit ( ). The two light beams differ in their angle of incidence on the boundary and/or in their polarization state. Measurement is preferably carried out under total reflection.

Apparatus for spectroscopic analysis of a fluid medium by attenuated reflection

Naphthalocyanines of the general formula I ##STR1## where the variables have the following meanings: R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are each independently of the others hydrogen, hydroxyl or C.sub.1 -C.sub.20 -alkyl or C.sub.1 -C.sub.20 -alkoxy, whose carbon chains may each be interrupted by from 1 to 4 oxygen atoms in ether function and which may be phenyl-substituted,

Naphthalocyanines

Use of pigment formulations for the preparation of pastes, printing inks

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Neustadt, Germany

Benno Sens