FI891636A0 - Apparatus for determining the lightness of the pulp or paper - Google Patents

Apparatus for determining the lightness of the pulp or paper

Info

Publication number
FI891636A0
FI891636A0 FI891636A FI891636A FI891636A0 FI 891636 A0 FI891636 A0 FI 891636A0 FI 891636 A FI891636 A FI 891636A FI 891636 A FI891636 A FI 891636A FI 891636 A0 FI891636 A0 FI 891636A0
Authority
FI
Finland
Prior art keywords
lightness
pulp
paper
determining
Prior art date
Application number
FI891636A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI95323C (en
FI95323B (en
FI891636A (en
Inventor
Mats-Erik Lekby
Original Assignee
Lekby Mats Erik
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lekby Mats Erik filed Critical Lekby Mats Erik
Publication of FI891636A0 publication Critical patent/FI891636A0/en
Publication of FI891636A publication Critical patent/FI891636A/en
Application granted granted Critical
Publication of FI95323B publication Critical patent/FI95323B/en
Publication of FI95323C publication Critical patent/FI95323C/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/0295—Constructional arrangements for removing other types of optical noise or for performing calibration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/86—Investigating moving sheets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/34—Paper
    • G01N33/346—Paper sheets

Landscapes

  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Pathology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Paper (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
FI891636A 1988-04-06 1989-04-05 Apparatus for determining the lightness of the pulp or paper FI95323C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8801250 1988-04-06
SE8801250A SE458726B (en) 1988-04-06 1988-04-06 MICRODATOR-BASED UNIT FOR LIGHTENING DETERMINATION OF PAPER OR RAW MATERIAL FOR PAPER MANUFACTURING

Publications (4)

Publication Number Publication Date
FI891636A0 true FI891636A0 (en) 1989-04-05
FI891636A FI891636A (en) 1989-10-06
FI95323B FI95323B (en) 1995-09-29
FI95323C FI95323C (en) 1996-01-10

Family

ID=20371917

Family Applications (1)

Application Number Title Priority Date Filing Date
FI891636A FI95323C (en) 1988-04-06 1989-04-05 Apparatus for determining the lightness of the pulp or paper

Country Status (2)

Country Link
FI (1) FI95323C (en)
SE (1) SE458726B (en)

Also Published As

Publication number Publication date
SE8801250D0 (en) 1988-04-06
SE458726B (en) 1989-04-24
FI95323C (en) 1996-01-10
FI95323B (en) 1995-09-29
SE8801250L (en) 1989-04-24
FI891636A (en) 1989-10-06

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Legal Events

Date Code Title Description
BB Publication of examined application
MM Patent lapsed
MM Patent lapsed

Owner name: LEKBY, MATS-ERIK