Introduction

The Formula Development and Labeling sections both provide for modifying formula density. This value is very important when reporting formula amounts in a volume amount. Since the procedures are the same in both sections, the topic is covered separately here.

TechWizard Online™ Online provides two options for determining density.
1. The user manually enters a value.
2. The density is calculated based on the total solids and tot fat content using the mix equation.

When the user elects to enter a density value manually, TechWizard Online™ provides several options for estimating the density. The density can be estimated based on the USDA equation, Mix equation or by using the Additive equation.

Density Equations

The Mix equation is useful for calculating the density of mixes containing liquid water and dispersed solids. The mix density equation does not work if any of the ingredients will not disperse in water. If you have ingredients that you know will not disperse in water then mark them as bulky in the ingredient file. The USDA equation is used specifically for diary liquids such as skim milk, milk, and cream. The Additive equation is for products where the items are dissolved in water (for example, ice cream and crushed cooky pieces).

USDA Equation
Density (kg/L at 40 F) =100/[100 + (%BF x 0.03928) – (%SNF x 0.39221)]
Density (lb/gal) = 8.3364 x Density (kg/L at 40 F)
BF – butterfat, SNF – milk solids not fat (MSNF)

Mix Equation
Density (kg/L at 60 F) =100/[(%fat/0.9) + (%SNF/1.58) + (100 – TS)]
Density (lb/gal) = Density (kg/L at 60 F)
SNF – solids not fat, TS – total solids

Additive Equation
Density (kg/L) = Total Weight of Ingredients (Kg) / Total Volume of Ingredients (l)

Modifying Formula Density

Whether in the Formula Development or Labeling section, the procedures for accessing the density editor are essentially the same.

Click the Formula button and select Edit Formula Density.

The Density Editor window appears.

The current density value and method of determining density is displayed (A).

The user has two options for estimating formula density:
1. Calculate the density using the Mix equation (B).

2. Manually enter a density value. Pressing one of the buttons shown at the bottom of the screen (C) will enter an estimated density based on the equation name displayed on the button. Generally, if you know the formula density, it is best to use that value.

Click the OK button to close the window and update TechWizard Online™.