Apparatus and method for sizing testing

Abstract

A method of measuring a Stockigt sizing degree of a paper or hoard is provided. The method includes: placing a paper or board, to which FeCl 3 (II) is dropped or applied, on NH 4 SCN solution; sequentially capturing, by using a camera, a process of forming reddish brown Fe(SCN) 3 wile the FeCl 3 (II) meets the NH 4 SCN solution penetrating in a thickness direction of the specimen, and recording RGB values of droplet image of the reddish brown Fe(SCN) 3 ; converting the RGB values into HSV values; recording hue (H) value of the HSV values with respect to time; and checking a point where a differentiation value of the H value recorded with respect to time becomes maximum.

1 . A method of measuring a sizing degree of a sized paper or board, comprising: placing a paper or board specimen, to which a first reagent is applied, on a second reagent;
 sequentially capturing, by using a camera, a process of forming compound taking on a predetermined color wile the first reagent meets the second reagent penetrating in a thickness direction of the specimen, and recording RGB values of droplet image of the compound;   converting the RGB values into HSV values;   recording hue (H) value of the HSV values with respect to time; and   measuring the sizing degree by checking a point where a differentiation value of the H value recorded with respect to time becomes maximum.   
   
   
       2 . The method of  claim 1 , wherein the first reagent is FeCl 3  (II), the second reagent is NH 4 SCN solution, and the compound is reddish brown Fe(SCN) 3 . 
   
   
       3 . The method of  claim 1 , wherein the recording of the RGB values of the droplet image of the compound comprises:
 obtaining sequential images showing color changes of the droplet of the compound with respect to time;   removing background image from the sequential images obtained a segmentation processing using a color binarization method; and   extracting only shape of droplet.   
   
   
       4 . A method of measuring a Stockigt sizing degree of a sized paper or board, comprising:
 placing a paper or board, to which FeCl 3  (II) is dropped or applied, on NH 4 SCN solution;   sequentially capturing, by using a camera, a process of forming reddish brown Fe(SCN) 3  wile the FeCl 3  (II) meets the NH 3 SCN solution penetrating in a thickness direction of the specimen, and recording RGB values of droplet image of the reddish brown Fe(SCN) 3 ;   converting the RGB values into HSV values;   recording hue (H) value of the HSV values with respect to time; and   measuring the sizing degree by checking a point where a differentiation value of the H value recorded with respect to time becomes maximum.   
   
   
       5 . An apparatus for measuring a sizing degree of a sized paper or board, comprising:
 a unit for applying a first reagent on a paper or board specimen;   a unit for playing the paper or board specimen on a second reagent solution;   an image capturing unit for sequentially capturing a process of forming compound taking on a predetermined color wile the first reagent meets the second reagent penetrating in a thickness direction of the specimen, and recording RGB values of droplet image of the compound;   a unit for converting the RGB values into HSV values; and   a unit for recording hue (H) value of the HSV values with respect to time, and measuring the sizing degree by checking a point where a differentiation value of the H value recorded with respect to time becomes maximum.   
   
   
       6 . The apparatus of  claim 5 , wherein the image capturing device obtains sequential images showing color changes of the droplet of the compound with respect to time, removes background image from the sequential images obtained a segmentation processing using a color binarization method, and extracts only shape of droplet.