Smoking product, method for producing said smoking product, and method for distinguishing granular activated carbon

Abstract

Provided are: a smoking product that has a tobacco rod and a filter comprising granular activated carbon, wherein the lightness L* value of said granular activated carbon in the CIE Lab color space is 11.50-19.00 and the acetone adsorption capacity is 29.0-41.0% percentage by mass; a method for producing said smoking product; and a method for distinguishing granular activated carbon.

What is claimed is: 
     
         1 . A smoking product comprising a tobacco rod portion and a filter portion including a granular activated carbon,
 wherein the granular activated carbon has a lightness L* of 11.50 or more and 19.00 or less in a CIE Lab colorimetric system and an acetone adsorption capacity of 29.0% or more and 41.0% or less in terms of mass fraction.   
     
     
         2 . The smoking product according to  claim 1 , wherein the granular activated carbon has a color difference ΔE of 14.00 or more and 21.50 or less in the CIE Lab colorimetric system. 
     
     
         3 . The smoking product according to  claim 1 , wherein the granular activated carbon is a granular coconut shell activated carbon. 
     
     
         4 . A method for producing a smoking product comprising a tobacco rod portion and a filter portion including a granular activated carbon,
 the method comprising a step of providing a granular activated carbon having a lightness L* of 11.50 or more and 19.00 or less in a CIE Lab colorimetric system and a step of adding the provided granular activated carbon to the filter portion.   
     
     
         5 . The method for producing a smoking product according to  claim 4 , wherein in the providing step, a granular activated carbon having a lightness L* of 11.50 or more and 19.00 or less and also having a color difference ΔE of 14.00 or more and 21.50 or less in the CIE Lab colorimetric system is provided. 
     
     
         6 . The method for producing a smoking product according to  claim 4 , wherein the granular activated carbon has an acetone adsorption capacity of 29.0% or more and 41.0% or less in terms of mass fraction. 
     
     
         7 . The method for producing a smoking product according to  claim 4 , wherein the granular activated carbon is a granular coconut shell activated carbon. 
     
     
         8 . A method for distinguishing a granular activated carbon added to a smoking product filter, the method comprising:
 a step of numerically expressing a color of the granular activated carbon in a CIE Lab colorimetric system; and   a step of sorting, as the granular activated carbon added to the smoking product filter, a granular activated carbon having a lightness L* of 11.50 or more and 19.00 or less in the CIE Lab colorimetric system.   
     
     
         9 . The method according to  claim 8 , wherein the step of sorting includes a step of sorting a granular activated carbon having a lightness L* of 11.50 or more and 19.00 or less and also having a color difference ΔE of 14.00 or more and 21.50 or less in the CIE Lab colorimetric system.