Provided sparklers contain combined form of aluminum or titanium, potassium perchlorate and dextrin. Sometimes oxidant like potassium nitrate and binding material (as for instance sugar, shellac and starch) are also used to produce these sparklers. These also contain magnesium to attain a distinctive white glow. Sparks are created due to the presence of metal in such sparklers. Due to their high ignition temperature, such crackers are safe to store. Their ignition involves combustion which is the outcome of chemical reaction. The oxidizer and metal powder of these sparklers produce large amount of energy after blending with each other. The produced energy creates flash of light, distinctive sound and minimal amount of heat. These crackers are non-poisonous as their perchlorate and nitrate based content is low. The role of oxidizer in sparklers deserves special mention. Oxidizers like chlorate, nitrate and perchlorates play significant role in burning the mixture of such crackers. Sulphur is a reducing agent that produces sulfur dioxide by reacting with oxygen. Such reducing agent plays the role of fuel needed to burn the oxygen. This oxygen is produced by oxidizing factor of these crackers.