The chapter discusses the manufacturing process of millboard, primarily using waste paper as the main raw material. Since 1964, the price of this material has increased significantly, leading to higher costs for wages and overheads. The company, Jackson's Millboard and Fibre Co., Ltd., has had to work overtime and install fully automated machines to mitigate these increases. Despite these efforts, operating costs remain a challenge, and the company's chairman, Mr. M. W. Jackson, expresses concerns about the economic outlook. However, there are hopes for improved turnover and export business, especially in the Far East. The chapter reviews a report from a meeting held in November 1963 by the British Ceramic Research Association, focusing on particle size measurement. The report highlights the importance of accurate particle size measurement in ceramics and other industries. Traditional methods like microscopy and centrifugation have been improved, but new techniques have not universal application. The meeting discussed various methods, including air-sedimentation pipette, sedimentation, elutriation, gravitales, and the Coulter counter. A questionnaire to industrial concerns, universities, and colleges revealed that manual methods are the most widely used, followed by air-sedimentation pipette and sedimentation methods. Comparative tests of these methods are planned to further evaluate their effectiveness. The chapter discusses the increasing role of surface active agents in various products, from oil paints and plastics to cosmetics and deodorants. These agents are crucial for emulsification and consistency in products. The book "Surface Active Agents: their Extraction, Characterisation and Determination" by Maurice Biss provides a comprehensive guide to identifying and analyzing these agents. The book categorizes surface active agents into emulsions, aqueous-based, non-aqueous-based, and dry-based groups, and covers techniques for their separation, determination, and concentration control. The book excludes domestic soap and detergent powders, which are the subject of specialized investigations.The chapter discusses the manufacturing process of millboard, primarily using waste paper as the main raw material. Since 1964, the price of this material has increased significantly, leading to higher costs for wages and overheads. The company, Jackson's Millboard and Fibre Co., Ltd., has had to work overtime and install fully automated machines to mitigate these increases. Despite these efforts, operating costs remain a challenge, and the company's chairman, Mr. M. W. Jackson, expresses concerns about the economic outlook. However, there are hopes for improved turnover and export business, especially in the Far East. The chapter reviews a report from a meeting held in November 1963 by the British Ceramic Research Association, focusing on particle size measurement. The report highlights the importance of accurate particle size measurement in ceramics and other industries. Traditional methods like microscopy and centrifugation have been improved, but new techniques have not universal application. The meeting discussed various methods, including air-sedimentation pipette, sedimentation, elutriation, gravitales, and the Coulter counter. A questionnaire to industrial concerns, universities, and colleges revealed that manual methods are the most widely used, followed by air-sedimentation pipette and sedimentation methods. Comparative tests of these methods are planned to further evaluate their effectiveness. The chapter discusses the increasing role of surface active agents in various products, from oil paints and plastics to cosmetics and deodorants. These agents are crucial for emulsification and consistency in products. The book "Surface Active Agents: their Extraction, Characterisation and Determination" by Maurice Biss provides a comprehensive guide to identifying and analyzing these agents. The book categorizes surface active agents into emulsions, aqueous-based, non-aqueous-based, and dry-based groups, and covers techniques for their separation, determination, and concentration control. The book excludes domestic soap and detergent powders, which are the subject of specialized investigations.