What Is The Purpose Of Cobb Sizing Tester?
The Gurley-Cobb sizing test can be used to test absorption or resistance to absorption of water, oil and other liquids. This procedure determines the quantity of water absorbed by a sample of paper or other sheet material in a specified time and under standardized conditions.
What is the importance of conducting the Cobb test?
The Cobb test is essential as it tests the ability of the paper to resist the penetration of water and quantity of water absorbed by the surface of fiberboard. If fiberboard absorbs too much water, the box may have difficulty maintaining strength and integrity.
What is a Cobb tester?
The cobb tester is a simple instrument which measures the water absorptiveness of paper, cardboard and corrugated fiberboard under standard conditions. The cobb sizing test is used worldwide to test absorption or resistance to absorption of water, oil and other liquids.
What is a good Cobb value?
Cobb values for liner grades are typically specified as being Target 100g/m2 up to a Maximum of 150g/m2, which means they are moderately chemically sized, and this applies across a broad range of paper weights possibly from 100g/m2–440g/m2.
What is the purpose of conducting test?
Exams enable both students and instructors to identify which areas of the material students do not understand. This allows students to seek help, and instructors to address areas that may need more attention, thus enabling student progression and improvement.
How does Cobb sizing value play an important role in printing?
Cobb sizing tester measures and calculates the water or any fluid consumed by the paper, fibreboard, and paperboard in at any given point of time during varied climatic conditions. The high Cobb measure of the papers and other related materials determines the capacity of the materials to contain dampness.
How is Cobb test calculated?
To determine the Cobb Value, subtract the weight of the sample before testing from the weight of the sample after testing.
How do you determine Cobb value?
Take the sample out carefully and use the roller to extract the extra amount of water. Weigh the sample. Now subtract the dry weight from the wet weight, the value you have is the Cobb value of Kraft paper. This the amount of water the sample absorbed in a defined time period.
What is the unit of Cobb?
The Cobb test determines the amount of water absorbed into the surface by a sized (non-bibulous) paper, paperboard, and corrugated fibreboard paper or paperboard sample in a set period of time, usually 60 or 180 seconds (Cobb60 or Cobb180). Water absorbency is quoted in g/m2.
What does Cobb do to cars?
Maps are created and tested to tune the ECU so that it supports and takes advantage of each part. With these results, COBB is able to create the Upgrade Path of Staged Packages that have all the necessary parts to upgrade your car. Learn more about this process in this video.
Can I use Cobb on any car?
Each Accessport is only compatible with certain vehicles. With many platforms, it can even be specific vehicles through specific model year ranges. Luckily, it’s pretty easy to determine which Accessport part number you need.
Can you tune with Cobb?
Custom Tuning with Accesstuner Pro
Many COBB Protuners are still operating under an alternate schedule and are also able to custom tune cars remotely.
Why is it called Cobb?
Cobb salad received its name from a restaurant owner named Robert Cobb. After a long night of service, Chef Cobb was tired and hungry at the Brown Derby in Hollywood, CA. He threw together a bunch of leftover ingredients into a bowl with lettuce and tossed them together with French dressing.
What is Cobb factor?
The Cobb value provides information about the water absorption capacity of cartonboard samples. The Cobb test determines the amount of water that is taken up by a defined area of cartonboard through one-sided contact with water, within a certain amount of time.
Who invented Cobb test?
In the 1950s, the Strong-Cobb tester was introduced. It was patented by Robert Albrecht on July 21, 1953. and used an air pump.
What are the five purposes of assessment?
Assessment purpose triangle. This graphical aid of the assessment purpose triangle depicts each of the basic purposes of assessment on opposing sides: assessment to support learning; assessment for accountability; assessment for certification, progress, and transfer.
What is the necessity of testing?
When defects are detected and subsequently fixed, this contributes to the quality of the components or system overall which results in a better product being produced. In addition, software testers may also be required to meet contractual or legal requirements or industry specific standards with their testing.
What is the purpose of testing and evaluation?
The fundamental purpose of Test & Evaluation (T&E) is to provide knowledge to assist in Risk Management that’s involved in developing, producing, operating, and sustaining systems and capabilities.
What is the purpose of sizing in paper making?
Sizing is used in papermaking to improve the absorption and wear characteristics of the paper. The most common materials used in sizing solutions are starch, latex, polyvinyl alcohol (PVA), and carboxymethyl cellulose (CMC).
What is sizing in printing?
Sizing is used during paper manufacture to reduce the paper’s tendency when dry to absorb liquid, with the goal of allowing inks and paints to remain on the surface of the paper and to dry there, rather than be absorbed into the paper.
Why is size important in packaging?
Correctly sizing a package eliminates excess material in production and waste. It also reduces amount of space the package takes up in the freight truck, and therefore reduces the shipment’s carbon footprint. Increase customer satisfaction. We all know that good things come in small packages.
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