  Infra-Red(IR) astronomical databases, namely, IRAS, 2MASS, WISE, and Spitzer,
are used to analyze photometric data of 126 carbon stars whose spectra are
visible in the First Byurakan Survey low-resolution spectral plates. Among
these, six new objects, recently confirmed on the digitized FBS plates, are
included. For three of them, moderate-resolution CCD optical spectra are also
presented. In this work several IR color-color diagrams are studied. Early and
late-type C stars are separated in the JHK Near-Infra-Red(NIR) color-color
plots, as well as in the WISE W3-W4 versus W1-W2 diagram. Late N-type
Asymptotic Giant Branch stars are redder in W1-W2, while early-types(CH and R
giants) are redder in W3-W4 as expected. Objects with W2-W3 > 1.0 mag. show
double-peaked spectral energy distribution, indicating the existence of the
circumstellar envelopes around them. 26 N-type stars have IRAS Point Source
Catalog(PSC) associations. For FBS 1812+455 IRAS Low-Resolution Spectra in the
wavelength range 7.7 - 22.6micron and Spitzer Space Telescope Spectra in the
range 5 - 38micro are presented clearly showing absorption features of
C2H2(acetylene) molecule at 7.5 and 13.7micron , and the SiC(silicone carbide)
emission at 11.3micron. The mass-loss rates for eight Mira-type variables are
derived from the K-[12] color and from the pulsation periods. The reddest
object among the targets is N-type C star FBS 2213+421, which belong to the
group of the cold post-AGB R Coronae Borealis(R CrB) variables.

Solar and Stellar Astrophysics