What are the differences form of baptism?

Answer 1

The Roman Catholic church accepts two broad classes of alternative to the sacrament of Baptism:- so-called Baptism by Desire, and Baptism by Blood.

If you search carefully you may find earlier versions of the Catechism (especially in non-English languages) which refer to Baptism by Desire and Baptism by Blood as different forms of Baptism, but this terminology often led to confusion - these days the Church prefers to speak of them as alternatives to Baptism (Baptism by water).

Mainstream Church doctrine does not accept any baptism before the Ministry of Our Lord as a valid sacrament (specifically the baptisms of John the Precursor are held to be different from true baptisms by the Council of Trent); a fuller treatment of the complex doctrinal reasoning surrounding pre-Christian baptism is offered in the New Advent Encyclopedia.

Answer 2

In the Catholic Faith there are two different forms of Baptism: Immersion (dunking) and Affusion (pouring); Aspersion (sprinkling) is NOT a licit form of Baptism.

1278 The essential rite of Baptism consists in immersing the candidate in water or pouring water on his head, while pronouncing the invocation of the Most Holy Trinity: the Father, the Son, and the Holy Spirit. (CCC)

From the Catholic Encyclopedia entry on Baptism:

"It is to be noted that it is not sufficient for the water to merely touch the candidate; it must also flow, otherwise there would seem to be no real ablution. At best, such a baptism would be considered doubtful. If the water touches only the hair, the sacrament has probably been validly conferred, though in practice the safer course must be followed. If only the clothes of the person have received the aspersion, the baptism is undoubtedly void."

It suddenly occurred to me that you could also have been speaking of forms of Baptism in addition to Baptism by Water (the Ordinary way people are Baptized). In addition to Baptism by Water there is also Baptism by Blood (Martyrdom) and Baptism of Desire.

From the Catechism of the Catholic Church:

"The Church has always held the firm conviction that those who suffer death for the sake of the faith without having received Baptism are baptized by their death for and with Christ. This Baptism of blood, like the desire for Baptism, brings about the fruits of Baptism without being a sacrament. (1258)"

"For catechumens who die before their Baptism, their explicit desire to receive it, together with repentance for their sins, and charity, assures them the salvation that they were not able to receive through the sacrament. (1259)"

**BOLDING IS MINE**