Principles of Inheritance and Variation

The Law of Dominance states: (i) characters are controlled by discrete units called factors; (ii) factors occur in pairs; (iii) in a dissimilar pair of factors one member dominates (dominant) the other (recessive).
So the first three statements are all parts of the Law of Dominance.
The fact that alleles do not blend, and that both the parental characters are recovered as such in the $F_2$ generation, is explained by the Law of Segregation: the two factors of a pair separate during gamete formation so that each gamete receives only one.
Hence the statement about non-blending of alleles and recovery of both characters in $F_2$ cannot be explained by the Law of Dominance.