The formula to figure your chance of getting AT LEAST 1 visual in a recessive het X het pairing is:
1 - 0.75^N
N is the number of eggs so the chance of getting at least 1 albino in a 4 egg clutch is 68%. With an 8 egg clutch your chance goes up to 90%. You never get all the way to 100% guaranteed but the more eggs the better your chance.