Viscosity is a measure that states the thick of a liquid or fluid. Viscosity is the nature of the fluid that is closely related with the obstacles to flow, like a liquid flowing in a rapid, water, alcohol, and gasoline. And the liquid flows slowly like glycerin and honey because the viscosity is great, so no other viscosity determines the speed of the flow of a fluid (Rao and Rizvi, 1995; Ahmad, 2007). The results showed that the additional of lemon juice giving significant effect (α = 5%) of the total value of viscosity, the higher the concentration of lemon juice then the lower the viscosity. This is due addition of lemon juice can increase or decrease the acidity of pH. The acidity of a product can reduce the viscosity, due happen sugar hydrolysis process by acid, so jelly formation more liquid. Furthermore, according to Desrosier (2008) that the formation of a gel (hydrocolloid) is affected by sugar, gelling materials, temperature, heating time and pH.