 Ternary diagrams could be a very useful tool for classifying crude oils. Here you see a ternary diagram, a triangle in essence. On the corners of the triangles we can see pure hydrocarbons. At the top where you see 100% aromatics that is just one point at the top represents pure aromatic compounds. On the left hand side at the bottom 100% paraffins point on the corner and on the right 100% naftines. The lines that connect these points represent binary mixtures. For example, if you connect aromatics corner with the paraffins on that line you will only have aromatics and paraffins. As an example let us define the region in this ternary diagram for the group 1 or classification 1 crude oils that are paraffinic crude oils. You see the horizontal line with an arrow pointing downward. So below that line the content of paraffins and naftines is greater than 50%. Above that line obviously aromatics are greater than 50%. Now establish the second boundary line for the group 1 crude oils that is paraffinic crude oils. You see the vertical line right in the middle of the triangle separating the triangle into two areas. To the left of that vertical line we will have paraffins contents greater than naftines everywhere to the left of this line. So with these two boundary lines then one horizontal one vertical we have established a region where the content of paraffins and naftines are greater than 50% and paraffin contents are greater than naftines. To establish the region for the type 1 crude oils we need the third boundary line. So you see here the line that is designating paraffin contents greater than 40%. So to the left of that line in the triangle the paraffin contents is greater than 40%. So all these three lines then designate the group 1 or type 1 crude oil region in the ternary diagram that is the paraffinic crude oils region.