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The effectiveness of biological and non-biological washing powders.

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Introduction

I have been asked the effectiveness of biological and non-biological washing powders. To investigate in these two types of washing powders, I am going to collect 9 pieces of cotton and put some droplets of blue ink on each piece of the cotton. I will then put one piece of inky cotton in a beaker of hot water, at a high temperature, one in a beaker of water with the same temperature but with some biological washing powder as well. I will put another in a beaker of water, again, with the same temperature but this time with some non-biological washing powder. In each beaker, I will stir the cotton piece for two minutes exactly with the same glass rod. ...read more.

Middle

On each piece of cotton I put 3 drops of ink. I used clean water in every beaker. I used Exactly 150ml of water in the beakers. When I used washing detergent, measured out 4 spoonfuls and made sure that they weighted the same. When I recorded the amounts of light, the light bulb distance never changed, and I always held the piece of cotton 1cm from the sensor. Each time, I stirred with the same glass rod and for exactly 2 minutes. Nothing changed but the temperature. I predict that from looking through the information about washing powders that non-biological washing detergent will be better, and work best at a high temperature. ...read more.

Conclusion

THE ANSWER MEANS THE LOWER THE AMOUNT OF LIGHT THROUGH, THE BETTER THE TEST HAS WORKED. In my prediction I said that Non-bio would be best, let the most light through and be best at a high temperature. The piece of cotton that was put through non-biological washing powder, let through the most light after being washed. It actually worked best at a lower temperature. This is best because washing machines can't wash clothes at extremely high temperatures. Obviously all the ink didn't come out but most did and that's pretty good for a little powder in a glass beaker stirred for 2 minutes with a glass rod. A washing machine is so much more high-tec than that, so it will obviously get out all the ink. After investigating, I say that whilst both washing powders are very good, non-biological are just that little bit better. ...read more.

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