To respond, one needs to look at the Catechism of the Catholic Church, which spells out the church's teaching on this sacrament.
1257 The Lord himself affirms that Baptism is necessary for salvation.60 He also commands his disciples to proclaim the Gospel to all nations and to baptize them.61 Baptism is necessary for salvation for those to whom the Gospel has been proclaimed and who have had the possibility of asking for this sacrament.62 The Church does not know of any means other than Baptism that assures entry into eternal beatitude; this is why she takes care not to neglect the mission she has received from the Lord to see that all who can be baptized are "reborn of water and the Spirit." God has bound salvation to the sacrament of Baptism, but he himself is not bound by his sacraments.An indelible spiritual mark . . .
1272 Incorporated into Christ by Baptism, the person baptized is configured to Christ. Baptism seals the Christian with the indelible spiritual mark (character) of his belonging to Christ. No sin can erase this mark, even if sin prevents Baptism from bearing the fruits of salvation.83 Given once for all, Baptism cannot be repeated.
1274 The Holy Spirit has marked us with the seal of the Lord ("Dominicus character") "for the day of redemption."86 "Baptism indeed is the seal of eternal life."87 The faithful Christian who has "kept the seal" until the end, remaining faithful to the demands of his Baptism, will be able to depart this life "marked with the sign of faith,"88 with his baptismal faith, in expectation of the blessed vision of God - the consummation of faith - and in the hope of resurrection.
From the way it is worded, it might as well be called branding. I am still confused. This is not what the article said. The article asserts that being baptized makes everyone ontologically "Catholic!" Which means we are all "Catholics" except that some are naughty and others are nice. :)
Also, I am not sure how is an infant "conformed to Christ?" What does that really mean?.