Made Secret Ink Experiment

Preface Sometimes called security inks, invisible ink or secret ink are substances that can become invisible to the application to the surface, or shortly afterwards. This ink is often used by security and intelligence professionals, to hide messages intended for specific audiences who know how to disclose concealed shipments. Ink Invisible Type Invisible ink can…

How Made Soil Fertility Detection Tool From Simple Materials

Preface Soil fertility is the key to success of a farm. However perfect a farming process but if not supported by the fertility of the land that surely will not bring maximum results. As an example of a case common to Indonesian farmers, farmers often provide excessive chemical fertilizers on their land but their production…

How To Dyeing Of Eggs

Introduction Egg dyeing is a simple and common activity. Egg are dyed for Easter celebrations as well as for other decorative purposes.The Chinese will dye their eggs red during birthdays to signify good luck. When an infant reaches one month old, eggs dyed red will be distributed to all relatives. What is the chemistry behind…

Soil pH

Introduction Soil can become acidic due to a number of causes. Rain water dissolves carbon dioxide from atmosphere forming carbonic acid. Organic decay from plants and animal results n formation of acetic, citric, oxalic and carbonic acids. When excess H+ ion accumulate in the soil colloid, the soil become acidic. To cure acidity of soil,…

Edible Indicators

Acids are compound that produce hydrogen ions (H+) when dissolved in water. An acid can be classified as weak or strong depending on the concentration of Hydrogen ions in solution. The strength of the acid is indicated by the scale which defined as the negative logarithm of the hydrogen ion concentration. The smaller number, the…

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